ANNALES HISTORICO-NATURALES MUSEI NATIONALIS HUNGARICI Volume 96 Budapest, 2004 pp. 115-152.

Platygastridae (Hymenoptera) from Mongolia*

P. N. B U H L

Troldh0jvej 3, DK-3310 0lsted, Denmark E-mail: pnbiihl@zmiic.ku.dk

Abstract - About 95 species of Platygastridae are recorded from Mongolia. The following 23 spe­cies are described as new to science: Amblyaspis kaszabi. Inostemma intermedium, I. kaszabi, I. kerulense, I . lanceolatum, I. mongolicum, Platygaster asiatica, P. brevipetiolata, P. crenulata, P. gaia, P. kaszabi, P. mongolica, P. oviventris, P. striatipleura, P. zavchanensis, Synopeas alatus, S. cryptus, S. kaszabi, S. mongoliens, S. neglectus, S. striatitergitis, S. subtilis, and S. vulgaris. With 92 figures.

Key words - Hymenoptera, Platygastridae, Amblyaspis, Inostemma, Synopeas, Platygaster, new species, Mongolia.

INTRODUCTION

In the years 1963-1968 the late Hungarian coleopterist, Dr. Z . KASZAB, col­lected a large amount of insects in Mongolia, among them the about 620 specimens of Platygastridae treated in the present paper.

When species are so difficult to separate as in Platygastridae, it is always a problem on the basis of morphospecies to decide when to name species as new to science, to assign them to already known species, or as questionable. As most spe­cies are described from Western Europe, a fürther problem with regard to Mongo­lian species is that geographic variation comes into the picture. In the present work minor differences in colour, sculpture etc. w i l l not be regarded as sufficient to jus­tify species rank, though very possibly there are biological differences between the widely separated populations of Europe and Mongolia. However, to prevent an in­flation of new names only clearly differentiated morphological entities are named as new, and to give a fairly clear idea of the diversity as many species as possible are placed under already existing names (when the alternative would be no name), though often with a question mark and an explanation. However, it is impossible to give purely objective criteria for determinations, especially with regard to poorly

* Results of the Zoological Explorations by Dr. Z. KASZAB in Mongolia. No. 508.

characterised, variable taxa with most often unknown bionomics such as platy-

gastrids.

A l l the already described species recorded below (or their very close relatives)

are well known from N W Europe, except Pyrgaspis haloxylonomyiae KOZLOV,

1967 and Anirama marikovskii (KOZLOV, 1967) described from Kazakhstan, and

Synopeas dentiscutellaris (SZABÓ, 1979) described from Mongolia. The platygastrid fauna of Mongolia was hitherto virtually unknown apart from the total of 11 species recorded by KOZLOV (1972,1974,1975a, 1975b) and SZABÓ (1979).

A l l material is deposited in the Department of Zoology, Hungarian Natural

History Museum, Budapest, Hungary.

Amblyaspis belus (WALKER, 1835)

Material examined- 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1600-1700 m, 22.VII-27.VIH. 1965; 1 female, Central aimak, 11 km S of pass Zosijn davaa, 90 km S of Ulan-Baator, 1650 m, 7.VI.1967; 1 male, Centra] aimak, Tosgoni ovoo, 10 km N of Ulan-Baator, 1700-1900 m, 23-24.VII.1967; 1 female, Bulgan aimak, between Somon Chischig-Ondör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.VI-23.VII. 1968; 1 female, Chövsgöl aimak, Alag Mort, 42 km NE of pass Chaldzan Sogotyn davaa, at river Tesijn gol, 1900 m, 14. V I I . 1968.

Amblyaspis kaszabi sp. n. (Figs 1-5)

Female - Length 1.2-1.5 mm. Black; antennae, mandibles, tegulae and legs dark brown; basal half of tibiae and segments 1-4 of tarsi lighter. Head from above (Fig. 1) 2.0 x as wide as long, as wide as mesosoma; occiput with a weak but complete carina, distinctly and slightly transversely re­ticulate-coriaceous; vertex and frons more superficially and not transversely reticulate. OOL:LOL = 5:3. Head in frontal view almost round, hardly wider than high (20:19); antenna (Fig. 2) with A l al­most as long as height of head (18:19). Mesosoma 1.5 x as long as wide, 1.1 x as high as wide. Sides of pronotum weakly and slightly longitudinally reticulate all over, except almost smooth hind mar­gin. Mesoscutum sparsely and evenly hairy, finely and uniformly reticulate-coriaceous, without trace of notauli; hind margin medially with a broad, dark, smooth plate just overreaching anterior margin of scutellum, laterally with numerous long hairs. Mesopleuron smooth. Scutellum (Fig. 3) densely hairy, posteriorly ending in a distinct, dark projection. Metapleuron with pilosity all over. Propodeal carinae dark, almost straight, anteriorly fused. Fore wing as long or almost as long as body, 2.7 x as long as wide, faintly brownish, with dense microtrichia; marginal cilia slightly more than 0.1 width of wing. Hind wing 7.6 x as long as wide; marginal cilia 0.5 width of wing. Metasoma (Fig. 4) very slightly longer to 1.2 x as long as head and mesosoma combined, 1.1 x as wide as mesosoma. T l with two weak longitudinal keels rather close together, smooth and bare between them, densely pubescent laterally. T2 smooth, with hairy basal foveae. T3-T6 reticulate-coriaceous all over, with a few super­ficially implanted hairs.

Male - Length 1.4 mm. Antenna (Fig. 5). Metasoma 0.8 x as long as head and mesosoma com­bined.

Material examined - Holotype female: Mongolia, Chentej aimak, between Somon Zencher-mandel and Somon Zargaltchaan, 1400 m, 27.VII.1965. Paratypes: 1 female, same data as holotype; 1 male, Central aimak, 126 km N of Ulan-Baator, at road, 1100 m, 7.VII.1964; 2 females, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1600-1700 m, 22.VII-27.VIII. 1965.

Remarks - Distinct on account of unusually prolonged scutellum. Differs from the otherwise similar A. angustula (THOMSON, 1859) also in lack of notauli.

Amblyaspis cf. prorsa (WALKER, 1835)

Material examined - 1 female, Chenteh aimak, between Somon Zenchermandal and Somon Zargaltchaan, 1400 m, 27.VII. 1965.

Figs 1-8. 1-5 = Amblyaspis kaszabi sp. n.: 1 = female head in dorsal view, 2 = female antenna, 3 = fe­male scutellum in lateral view, 4 = female metasoma in dorsal view, 5 = male antenna. 6-8 = Ino­stemma intermedium sp. n. female: 6 = head in dorsal view, 7 = antenna, 8 = metasoma in dorsal view

Amblyaspis roboris ( H A L I D A Y , 1835)

Material examined - 1 female, Central aimak, 12 km SE of Ulan-Baator, Nucht in Bogdo ul, 1500 m, 6.VII.1964; 1 female, Central aimak, Tosgoni ovoo, 6-10 km N of Ulan-Baator, 1700 m, 7-8.VI.1968; 1 female, Central aimak, 11 km ESE of Somon Bajanzogt, 1600 m, 13.VI.1968; 1 fe­male, Bulgan aimak, between Somon Chischig-Ondör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.VI.1968.

Amblyaspis scelionoides ( H A L I D A Y , 1835)

Material examined - 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1600 m, 22.VII-27.VIII. 1965; 1 male, Archangaj aimak, Changaj mountains, 8 km W of Somon Urdtamir, 1620 m, 21.VII. 1966; 1 female, Bulgan aimak, between Somon Chischig-Öndör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.VI-23. VI I . 1968.

Amblyaspis Itritici (WALKER, 1835)

Material examined - 1 male, Bulgan aimak, between Somon Chischig-Öndör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.VI.1968; 1 female, Central aimak, 11 km ESE of Somon Bajanzogt, 1600-1700 m, 26.VII.1968.

Amblyaspis s pp.

Remarks - About 3 species each represented by 1-4 specimens could not be placed in this genus of very similar species.

Anirama marikovskii (KOZLOV, 1967)

Material examined - 4 females, 1 male, Gobi Altaj aimak, Schargyn Gobi SE corner, 1130 m, 24.VI.1966; 1 male, Gobi Altaj aimak, Zachuj Gobi, 10 km N of Chatan chajrchan mountains, 1150 m, 27.VI.1966; 6 females, Southgobi aimak, 100 km W of border post Ovot Chuural, 1250 m, 23.VI.1967.

Fidiobia rugosifrons CRAWFORD, 1916

Material examined - 1 female, Midgobi aimak, 20 km S of Somon Delgerzogt, 1480 m, 9.VI.1967; 1 male, Chövsgöl aimak, 3 km SW of Somon Burenchaan, 1600m,21.VI-16.VII.1968.

Inostemma Iboscii (JURINE, 1807)

Material examined - 2 females, Chentej aimak, 150 km ENE of Öndörchaan, 10 km S of Kerulen, 1000 m, 30.VII. 1965; 1 female, Chentej aimak, Somon Tumunzogt, 160 km ENE of Öndörchaan, 1000 m, 31.VII. 1965; 1 female, Central aimak, SE of Somon Bajanzogt, 1600 m, 11. V I . 1966.

Remarks - The specimens have somewhat shorter cornutus and T6 than typi­cal /. boscii.

Inostemma intermedium sp. n. (Figs 6-8)

Female - Length 1.4-1.5 mm. Black, antennae hardly lighter; legs dark brown; trochanters, both ends of tibia and segments 1-4 of tarsi slightly lighter. Head from above (Fig. 6) 2.3 x as wide as long, hardly wider than mesosoma, distinctly and almost uniformly reticulate-coriaceous without transverse elements; vertex without trace of notch; OOL equal to longer diameter of lateral ocellus; antenna (Fig. 7) with A3 about twice as long as wide, 1.4 x as long as A4, A8-A9 each about 1.2 x as long as wide. Mesosoma 1.25 x as long as wide, and 1.25 x as wide as high. Mesoscutum sculptured as head, posteriorly slightly smoother, with complete notauli. Fore wing 2.3 x as long as wide, almost clear, with very short marginal cilia. Metasoma (Fig. 8) 1.1 x as long as head and mesosoma com­bined (excluding cornutus), about 0.9 x as wide as mesosoma. Cornutus slightly short of reaching an­terior margin of mesoscutum, finely longitudinally striated. T2 laterally finely striated to half of length. T3 laterally and T4-T6 all over with fine reticulate sculpture; apical tergites with numerous superficially implanted hairs; T6 twice as long as T5, about 0.7 x as long as its basal width.

Material examined - Holotype female: Mongolia, Southgobi aimak, Nojon nuruu, 34 km NE of border post Ovot Chuural, 1800 m, 20.VI.1967. Paratypes: 2 females, same data as holotype.

Remarks - This species has more slender antennái club and less slender cornutus than I . kaszabi sp. n. described below. /. intermedium differs from I . acuticorne MUSIL, 1958 e.g. in shape of apical tergites, cf. KOZLOV (1978).

Inostemma kaszabi sp. n. (Figs 9-11)

Female - Length 1.3-1.4 mm. Black, antennae hardly lighter; legs dark brown; trochanters, both ends of tibiae, and segments 1-4 of tarsi lighter brown. Head from above (Fig. 9) 2.1 x as wide as long, as wide as mesosoma, finely reticulate-coriaceous with slightly transverse elements; vertex without trace of notch; OOL equal to diameter of lateral ocellus; antenna (Fig. 10) with A3 about 1.5 x as long as wide, A4 slightly shorter. Mesosoma 1.25 x as long as wide, hardly 1.2 x as wide as high. Mesoscutum superficially reticulate-coriaceous, in posterior half with smooth spots; notauli com-

plete, posteriorly slightly widened and smooth. Fore wing clear, 2.4 x as long as wide, with short mar­ginal cilia. Metasoma (Fig. 11) 1.1 x as long as head and mesosoma combined (excluding cornutus). hardly 0.9 x as wide as mesosoma. Cornutus reaching anterior margin of mesosoma, finely longitudi­nally striated. T2 laterally striated to hardly 0.4, rest of tergite smooth. T3-T6 with distinct reticulate microsculpture nearly all over and with numerous superficially implanted hairs; T6 fully twice as long as T5, hardly longer than wide.

Figs 9-14 . 9-11= Inostemma kaszabi sp. n., female: 9 = head in dorsal view, 10 = antenna, 11 = meta­soma in dorsal view. 12-14 = /. kerulense sp. n., female: 12 = head in dorsal view, 13 = antenna, 14 = me­

tasoma in dorsal view

Male - Length 1.2 mm. Antenna with A4 curved and widened at apex, slightly wider than A3; A8-A9 each about as long as wide.

Material examined - Holotype female: Mongolia, Chövsgöl aimak, between Somon Tosoncengel and Somon Ich-ul, 22 km E of Tosoncengel, 1150 m, 21.VII. 1968. Paratypes: 2 fe­males, 1 male, same data as holotype.

Remarks - I . kaszabi has flagellum more slender than in /. hispo WALKER, 1838 sensu KOZLOV (1978); cornutus shorter than in I.favo WALKER, 1838.

Inostemma kerulense sp. n. (Figs 12-14)

Female - Length 1.4-1.7 mm. Black; antennae and legs dark brown, pedicel slightly lighter; trochanters, both ends of tibiae, and segments 1-4 of tarsi light brown. Head from above (Fig. 12) 2.0 x as wide as long, hardly wider than mesosoma, distinctly and uniformly reticulate-coriaceous with­out transverse elements; vertex very slightly concave medially; OOL slightly shorter than diameter of lateral ocellus; antenna (Fig. 13) with A3 1.6 x as long as wide, 1.5 x as long as A4 which is as wide as long. Mesosoma hardly 1.25 x as long as wide, 1.25 x as wide as high. Mesoscutum almost uniformly reticulate-coriaceous, slightly smoother sculptured than head, with complete notauli. Fore wing hardly 2.5 x as long as wide, faintly yellowish, without marginal cilia. Metasoma (Fig. 14) 1.2 x as long as head and mesosoma combined (excluding cornutus), hardly more than 0.8 x as wide as mesosoma. Cornutus somewhat longitudinally reticulate-coriaceous, hardly overreaching anterior margin of mesosoma. T2 laterally finely longitudinally striated, striae behind middle becoming faint longitudinal microsculpture. T3-T5 distinctly reticulate-coriaceous except along hind margins, T6 with such sculpture all over; apical tergites with irregulary arranged superficially implanted hairs; T6 2.0 x as long as T5, hardly longer than wide.

Male - Length 1.3 mm. Antenna with A4 hardly modified, not wider than A3; A8-A9 each about as long as wide; fore wing with short marginal cilia.

Material examined - Holotype female: Mongolia, Chentej aimak, 150 km ENE of Öndör­chaan, 10 km S of Kerulen, 1000 m, 30.VII. 1965. Paratypes: 2 females, 1 male, same data as holo­type; 1 female, Cojbalsan aimak, 15 km N of Somon Galuut, 850 m, 17.VIII. 1965.

Remarks - Female antennae of this species less slender than in /. reticulation SZELÉNYI, 1938 and /. abnormale TOMSIK, 1950; /. kerulense differs from /. glaphyra KOZLOV, 1974 e.g. in having less transverse head, shorter female A4 and relatively longer female T6, cf. also SZELÉNYI (1938), TOMSÍK (1950), and KOZLOV (1974).

Inostemma lanceolatum sp. n. (Figs 15-17)

Female - Length 1.5-1.8 mm. Black, antennae and legs dark brown; both ends of tibiae and segments 1-4 of tarsi light brown. Head from above (Fig. 15) 1.9 x as wide as long, very slightly wider than mesosoma, distinctly and uniformly reticulate-coriaceous, with transverse elements; ver­tex very slightly concave; OOL equal to diameter of lateral ocellus; antenna (Fig. 16) with A3 fully 1.6 x as long as wide, 1.3 x as long as A4. Mesosoma 1.25 x as long as wide, hardly 1.2 x as wide as high. Mesoscutum uniformly sculptured as head, with complete notauli. Fore wing 2.5 x as long as wide, clear, with very short marginal cilia. Metasoma (Fig. 17) 1.4 x as long as head and mesosoma combined (excluding cornutus), 0.9 x as wide as mesosoma. Cornutus just overreaching posterior ocelli, rather slender and curved, finely longitudinally striated. T2 laterally finely striated to about half of length, behind striae with weak microsculpture almost to hind margin. T3-T6 with faint microsculpture except along hind margins, with numerous irregulary distributed, superficially im­planted hairs; T6 2.0 x as long as T5, 1.2-1.4 x as long as wide.

Material examined - Holotype female: Mongolia, Suchebaator aimak, river Bajan gol 85 km NE of Somon Deriganga, 1100 m, 8. VI I I . 1965. Paratypes: 4 females, same data as holotype.

Remarks - This species has A4 and T6 longer than in I.favo WALKER, 1838, and flagellum more slender than in /. hispo WALKER, 1838 sensu KOZLOV (1978); it has less transverse head and slightly more slender antennae than /. contariniae SZELÉNYI, 1938, and it differs from /. walkeri KlEFFER, 1914 in different structure

of antennae and metasoma, cf. KlEFFER (1926) and SZELÉNYI (1938).

Inostemma mongolicum sp. n. (Figs 18-20)

Female - Length 1.7 mm. Black, antennae and legs dark brown; A2-A5, trochanters, apex of femora, both ends of tibiae, and segments 1—4 of tarsi more or less light brown. Head from above (Fig. 18) 1.8 x as wide as long, hardly as wide as mesosoma, evenly and distinctly reticu­late-coriaceous without transverse elements; vertex without notch; OOL 1.5 x diameter of lateral ocellus; antenna (Fig. 19) with A3-A4 of equal length, each about 1.6 x as long as wide. Mesosoma 1.2 x as long as wide, 1.25 x as wide as high. Mesoscutum uniformly and slightly weaker reticu­late-coriaceous than head, with complete notauli. Fore wing almost clear, 3.0 x as long as wide, with very short marginal cilia. Metasoma (Fig. 20) 1.3 x as long as head and mesosoma combined (exclud­ing cornutus), slightly narrower than mesosoma. Cornutus reaching anterior margin of mesoscutum, distinctly reticulate-coriaceous, only slightly curved. T2 laterally with fine striation to half of length. T3-T6 smooth, each in basal half with faint reticulation, laterally with some irregulary arranged, su­perficially implanted hairs; T6 2.0 x as long as T5, as long as wide.

Material examined - Holotype female: Mongolia, Central aimak, Bogdo ul, Bugijn az achuj, 1650 m, 3I.V. 1967.

Remarks - This species is much larger than the somewhat similar /. reticu-latum SZELÉNYI, 1938, and it differs from /. abnormale TOMSÍK, 1950 e.g. in sculpture of head, cf. also SZELÉNYI (1938) and TOMSIK (1950).

Figs 1 5 - 2 0 . Inostemma lanceolatum sp. n., female: 15 = head in dorsal view, 16 = antenna, 17 = metasoma in dorsal view. 18-20 = /. mongolicum sp. n., female: 18 = head in dorsal view, 19 = an­

tenna, 20 = metasoma in dorsal view

Inostemma spp.

Remarks - About 6 species in at most a few specimens, one species probably close to I. glaphyra KOZLOV, 1974, could not be placed, perhaps some represent just aberrant individuals.

Isocybus Ibifracticornis (ZETTERSTEDT, 1838)

Material examined - 3 females, 1 male, Central aimak, about 30 km E of Somon Nalajch, 1530 m, 14. V I . 1966; 1 female, Archangaj aimak, Changaj mountains, 9 km NE of river Egijn davaa, 2500 m, 19. VI I . 1966.

Isocybus locellaris KlEFFER, 1916

Material examined - 1 female, Uburchangaj aimak, Changaj mountains, 2 km S of Somon Schanch, 1690 m, 30.VI.1964; 1 male, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1800 m, 23.VII.1965; 1 female, Archangaj aimak, Changaj mountains, Zezerleg, 1650 m, 19.VI.1966; 1 male, Central aimak, Tosgoni ovoo, 5-10 km N of Ulan-Baator, 1500-1700 m, 19-24.VII.1967; 1 female, Bulgan aimak, 7 km NW of Somon, Chanzargalant, 1350 m, 16.VI.1968.

Isocybus thomsoni KlEFFER, 1926

Material examined - 3 females, I male, Central aimak, about 30 km E of Somon Nalajch, 1530 m, 14.VI.1966.

Isostasius inserens (KIRBY, 1800)

Material examined - 1 female, Suchebaator aimak, river Bajan gol 85 km NE of Somon Dariganga, 1100 m, 8.VIII.1965.

Leptacis orchymonti (DEBAUCHE, 1947)

Material examined - 1 female, 1 male, Central aimak, Tosgoni ovoo, 10 km N of Ulan-Baator, 1700-1900 m, 23-24.VII.1967.

Metaclisis sp.

Material examined - 3 females, 2 males, Zavchan aimak, Choit chunch, 26 km ENE oflake Telmen nuur, 2150 m, 13.VII.1968; 5 females, 3 males, Chövsgöl aimak, Alag Mort, 42 km NE of pass Chaldzan Sogotyn davaa, at river Tesijn gol, 1900 m, 14.VII. 1968.

Remarks - A species probably close to M. areolatus ( H A L I D A Y , 1835).

Platygaster asiatica sp. n. (Figs 21-24)

Female - Length 2.2 mm. Black, antennae dark brown; extreme ends of A l , and most of A2 lighter; all coxae blackish; fore femur and tibia light brown; mid and hind legs dark brown, boths ends of tibiae lighter; segments \-A of all tarsi light brown. Head from above (Fig. 21) 1.8 x as wide as long, very slightly wider than mesosoma, dull; occiput, vertex and upper third of frons almost uni­formly, finely reticulate-coriaceous (not transversely so), reticulation lower on frons becoming larger and somewhat transverse, lower two-thirds of frons also with a few oblique striae and transverse wrinkles above antennae. Head in frontal view 1.2 x as wide as high; antenna (Fig. 22) with A l fully 0.9 x as long as height of head, A9 1.6 x as long as wide. Mesosoma 1.6 x as long as wide, very slightly higher than wide. Sides of pronotum reticulate-coriaceous in upper half, smooth and with scattered hairs in lower half. Mesoscutum dull, distinctly and uniformly reticulate-coriaceous, with very few hairs; admedian lines indicated in anterior third; notauli complete and deep, meeting in a fine point not reaching base of scutellum; scuto-scutellar grooves wide, almost bare. Mesopleuron finely longitudinally striated in slightly more than upper half. Scutellum (Fig. 23) uniformly sculp­tured as mesoscutum, with very sparse hairs. Metapleuron with pilosity all over. Propodeal carinae parallel, area between them about as long as wide, smooth and shiny. Fore wing 2.8 x as long as wide, almost clear, nearly reaching tip of metasoma, with fine and dense microtrichia and short marginal cilia. Hind wing 5.6 x as long as wide, with four hamuli; marginal cilia 0.25 width of wing. Metasoma (Fig. 24) 1.5 x as long as head and mesosoma combined, as wide as mesosoma. T l somewhat uneenly crenulated. T2 striated over whole width to 0.8. T3-T6 smooth, with scattered, superficially implanted hairs.

Material examined - Holotype female: Mongolia, Bulgan aimak, 7 km NW of Somon, Chan-zargalant, 1350 m, 16.VI.1968.

Remarks - Close to P. vulgaris BUHL, 1998, but this species has distinctly shorter antennae than P. asiatica (and hind wing with only three hamuli), cf. BUHL ( 1998/?).

Platygaster athamas WALKER, 1835

Material examined - 1 female, Suchebaator aimak, river Bajan gol 85 km NE of Somon Dariganga, 1100 m, 8.VIII.1965; 2 females, Central aimak, Tosgoni ovoo, 5-10 km from Ulan-Baator, 1500-1900 m, 19-24.VII.1967; 2 females, Zavchan aimak, Choit chunch, 26 km ENE oflake

Telmen nuur, 2150 m, 13.VII.1968; 1 female, Central aimak, 11 km ESE of Somon Bajanzogt, 1600-1700 m, 26.VII.1968.

Platygaster lattenuata W A L K E R , 1835

Material examined - 1 female, Central aimak, Ulan-Baator, Zaisan in Bogdo ul, 1600 m, 6.VI.1966; 1 female, Central aimak, SE of Somon Bajanzogt, 1600 m, 11.VI.1966; 1 female, Central aimak, about 30 km E of Somon Nalajch, 1530 m, 14.VI. 1966.

Remarks - The specimens differ from typical P. attenuata in having meta­soma less sculptured.

Figs 21-28. Platygaster asiatica sp. n., female: 21 - head in dorsal view, 22 = antenna, 23 = scutellum in lateral view, 24 = metasoma in dorsal view. 25-28 = P. brevipetiolata sp. n., female: 25 = head in

dorsal view, 26 = antenna, 27 = scutellum in lateral view, 28 = metasoma in dorsal view

Platygaster betulae (KlEFFER, 1916)

Material examined - 4 females, 1 male, Central aimak, Tosgoni ovoo, 6-10 km N of Ulan-Baator, 1700 m, 4-8. VI . 1968.

Platygaster betularia KlEFFER, 1916

Material examined - 2 females, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1650 m, 3.VI. 1967; 9 females, Central aimak, Tosgoni ovoo, 6-10 km from Ulan-Baator, 1700 m, 4-8.VI. 1968; 2 females, Central aimak, Bugijn az achuj in Bogdo ul, 36 km SW of Ulan-Baator, 1650 m, 10.VI.1968.

Platygaster brevipetiolata sp. n. (Figs 25-28)

Female - Length 1.2 mm. Shiny black, antennae hardly lighter; legs dark brown, both ends of tibiae slightly lighter. Head from above (Fig. 25) 2.0 x as wide as long, slightly wider than mesosoma; occiput rather strongly transversely striated; vertex moderately reticulate-coriaceous; frons reticulate-coriaceous in upper half, in lower half becoming finely fan-like striated, medially smooth. OOL: LOL = 4:3. Head in frontal view 1.3 x as wide as high. Antenna (Fig. 26) with A l 0.75 x as long as height of head; A9 as long as wide. Mesosoma hardly 1.3 x as long as wide, hardly higher than wide. Sides of pronotum longitudinally reticulate-coriaceous, smooth along upper and hind mar­gins. Mesoscutum almost entirely smooth, with a few hairs, with very weak indications of notauli, these ending in weak rugosity at anterior margin; mid lobe posteriorly slightly and bluntly prolonged to base of scutellum; scuto-scutellar grooves wide, each with 8-9 long hairs. Mesopleuron smooth. Scutellum (Fig. 27) smooth, towards sides with numerous slightly raised hair-implantations. Metapleuron finely sculptured, with sparse pilosity. Propodeal carinae very short, well separated, area between them smooth. Fore wing almost as long as entire body, 2.2 x as long as wide, almost clear, with dense microtrichia; marginal cilia short. Hind wing 5.3 x as long as wide, with two hamuli; marginal cilia 0.2 width of wing. Metasoma (Fig. 28) 1.1 x as long as mesosoma, about as wide as this. T l Finely crenulated, with two slightly stronger carinae. T2 striated in basal foveae to hardly half of length, medially slightly shorter. T3-T6 smooth; T3-T4 with moderately deeply im­planted hairs laterally, T5 with a complete transverse row of such hairs, T6 with a few such hairs.

Material examined - Holotype female: Mongolia, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1650 m, 3.VI.1967.

Remarks - In many ways similar to P. etsuhoae BUHL, 1999 from Spain, but this species differs from P. brevipetiolata e.g. in having finer and weaker sculp­tured head, less smooth mesoscutum and shorter notauli, cf. also BUHL (1999/?).

Platygaster Ichloropus THOMSON, 1859

Material examined - 1 male, Central aimak, Bogdo ul, Bugijn az achuj, 1650 m, 3 I.V. 1967; 1 female, Bulgan aimak, between Somon Chischig-Öndör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.VI.1968.

Platygaster compressicornis (THOMSON, 1859)

Material examined - 2 females, Chovd aimak, Mongol Altaj mountains, 6 km N of pass Bag Ulaan davaa, 2800 m, 9.VII. 1966; 1 female, Uvs aimak, pass Ulaan davaa, at eastern slope, between lake Örög nuur and Ulaangom, 1950 m, 6.VII.1968.

Platygaster crenulata sp. n. (Figs 29-32)

Female - Length 1.4 mm. Black, antennae and legs hardly lighter, very dark brown. Head in dorsal view (Fig. 29) fully twice as wide as long, very slightly wider than mesosoma; occiput rather strongly and densely transversely striated; vertex finely and somewhat transversely reticu­late-coriaceous; frons finely fan-like reticulate-coriaceous. OOL and LOL about equal. Head in fron­tal view one and a third times as wide as high; antenna (Fig. 30) with A l 0.8 x as long as height of head; preapical antennái segments each about as long as wide. Mesosoma 1.5 x as long as wide, 1.1 x as high as wide. Sides of pronotum finely longitudinally reticulate-coriaceous, smooth along rather narrow hind margin. Mesoscutum with few hairs, finely reticulate, almost smooth on lateral lobes and posteriorly on mid lobe, sculpture stongest in front of notauli, these missing in anterior 0.4; mid lobe slightly prolonged to base of scutellum, rather narrow here; scuto-scutellar grooves moderately hairy. Mesopleuron smooth. Scutellum (Fig. 31) smooth, with rather sparse hairs. Metapleuron with pilosity all over. Propodeal carinae short, much transverse area between them smooth. Fore wing 0.8 x as long as body, 2.2 x as long as wide, clear, with fine and dense microtrichia; marginal cilia short. Hind wing 4.8 x as long as wide, with two hamuli; marginal cilia 0.2 width of wing. Metasoma (Fig. 32) fully 0.9 x as long as head and mesosoma combined, as wide as mesosoma. T l strongly crenulated with three slightly stronger longitudinal carinae. T2 strongly striated in basal foveae to nearly 0.6 of length, medially to slightly less than half of length. T3-T6 smooth, T3-T5 each with a medially interrupted transverse row of rather superficially implanted hairs, T6 with scattered hairs.

Material examined - Holotype female: Mongolia, Central aimak, ca. 30 km E of Somon Nalajch, 1530 m, 14.VI.1966.

Remarks - Differs from P. intermedia BUHL, 2004 and P. uniformis BUHL, 2004 in shape and sculpture of head and in sculpture of T1-T2, from P. eriphyie WALKER, 1835 in having notauli incomplete. P. crenulata is generally similar to P. gyrone SZELÉNYI, 1958 but has slightly less slender antennae, denser micro­trichia on fore wings, and more striated T2 than this, cf. SZELÉNYI (1958). P. cre-

nulata is perhaps closest to P. misella BUHL, 2004. It is as dark as this species but larger and with slightly more slender antennae than misella, with wider metasoma, more unevenly sculptured T l and stronger striated T2, this last being a key charac­ter of P. crenulata.

Platygaster cyrsilus W A L K E R , 1835

Material examined - 1 female, Bajanchongor aimak, oasis Echin gol, 90 km NE of border post Oaganbulag, 950 m, 27-28.VI. 1968.

Figs 29-36. 29-32 = Platygaster crenulata sp. n., female: 29 = head in dorsal view, 30 = antenna, 31 = scutellum in lateral view, 32 = metasoma in dorsal view. 33-36 = P. gaia sp. n., female: 33 = head

in dorsal view, 34 = antenna, 35 = scutellum in lateral view, 36 = metasoma in dorsal view

Platygaster danica B U H L , 1999

Material examined - 1 female, Bulgan aimak, between Somon Chischig-Öndör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.V1.1968; 1 female, Bulgan aimak, 7 km NW of Somon Chanzargalant, 1350 m, 16.VI.1968.

Platygaster Idemades W A L K E R , 1835

Material examined - 1 female, Cojbalsan aimak, 20 km SW of Somon Bajan-uul, 820 m, 18.VIII.1965.

Platygaster gaia sp. n. (Figs 33-36)

Female - Length 1.7-2.4 mm.. Black, antennae and legs hardly lighter; boths ends of all tibiae, and all tarsi, dark reddish brown. Head from above (Fig. 33) 2.1 x as wide as long, 1.1 x as wide as mesosoma; occiput transversely reticulate-coriaceous and with some distinct transverse wrinkles; vertex reticulate-coriaceous; frons more superficially, transversely reticulate, medially almost smooth. OOL = 1.4 LOL. Head in frontal view fully one and a third times as wide as high; antenna (Fig. 34) with A1 0.8 x as long as height of head; A9 2.0 x as long as wide. Mesosoma hardly 1.4 x as long as wide, 1.1 x as high as wide. Sides of pronotum finely reticulate-coriaceous in upper and ante­rior half, rest smooth. Mesoscutum with a few hairs along notauli which are complete and deep, disc distinctly reticulate-coriaceous, longitudinally so in posterior half of mid lobe, lateral lobes smooth in outer half; mid lobe touching base of scutellum in a fine point; scuto-scutellar grooves almost bare. Mesopleuron smooth. Scutellum (Fig. 35) weakly reticulate-coriaceous, sparsely hairy. Metapleuron with pilosity all over. Propodeal carinae parallel; area between them about as long as wide, smooth and shiny. Fore wing reaching to middle of T6, 2.4 x as long as wide, almost clear and with dense microtrichia; marginal cilia short. Hind wing 4.8 x as long as wide, with two hamuli; marginal cilia hardly 0.2 width of wing. Metasoma (Fig. 36) 1.5 x as long as head and mesosoma combined, hardly as wide as mesosoma. T l with two strong longitudinal keels and a weaker one between them. T2 stri­ated in basal foveae to half of length, medially slightly shorter, rest of tergite smooth. T3 almost smooth; T4-T5 laterally with weak microsculpture, longitudinal on T5; T6 smooth, with brownish tint. Apical tergites with a few superficially implanted hairs, weakly convex, T5 2.4 x as wide as high. Sternite 2 with a distinct hump anteriorly.

Material examined - Holotype female: Mongolia, Tosgoni ovoo, 6-10 km N of Ulan-Baator, 1700 m, 7-8.VI.1968. Paratypes: 3 females, Finland, N, Nurmijärvi, 17.V.I989, 16.VI.1991 and 19. V I . 1993; 3 females, Finland, St, Huittinen, 29.V.1993; 1 female, Finland, Es, Mikkelin mik., 3.VI. 1989; 1 female, Finland, Eh, Hartola, 10.VI.1987; 1 female, Finland, Ta, Lahti, 5.VI.1993. Al l leg. M. KOPONEN, and deposited in the Department of Applied Biology, University of Helsinki (Finland).

Remarks - This species has longer antennae than P. munita WALKER, 1835, shorter than P. compressicornis (THOMSON, 1859) which also has differently shaped

metasoma. P. sambuci (KlEFFER, 1916), which also has slender antennae, lacks notauli. Cf. HUGGERT (1973), KlEFFER (1926), and VLUG (1985)

Platygaster gracilipes HUGGERT, 1975

Material examined - 1 male, Central aimak, SE of Somon Bajancogt, 1600 m, 5. V I I . 1964; 5 fe­males, Central aimak, 126 km N of Ulan-Baator, at road, 1100 m, 9.VII.1964; 1 female, Central aimak, 10 km W of Somon Delgerchaan, 1250 m, 24.VIII. 1965; 1 female, Chövsgöl aimak, Alag Mort, 42 km NE of pass Chaldzan Sogotyn davaa, at river Tesijn gol, 1900 m, 14.VII.1968.

Platygaster gyge WALKER, 1835

Material examined - 2 females, Archangaj aimak, Changaj mountains, between Somon Ichtamir and Somon Culuut, 20 km W of Ichtamir, 2150 m, 20.VI. 1966; 1 female, Bulgan aimak, be­tween Somon Chischig-Öndör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.VI.1968; 2 females, Bulgan aimak, 7 km NW of Somon Chanzargalant, 1350 m, 16.VI.1968.

Platygaster hyalinata (THOMSON, 1859)

Material examined - 1 female, Chentej aimak, 10 km W of Somon Delgerchaan, 1250 m, 24.VIII.1965; 1 female, Central aimak, 11 km ESE of Somon Bajanzogt, 1600 m, 13.VI.1968; 1 fe­male, Zavchan aimak, Choit chunch, 26 km ENE oflake Telmen nuur, 2150 m, 13. VI I . 1968.

Platygaster kaszabi sp. n. (Figs 37—41 )

Female - Length 1.3-1.6 mm. Black, antennae and legs dark brown with partly lighter tibiae and tarsi in darkest specimens, A1-A2 and legs rather bright reddish in lightest specimens. Head from above (Fig. 37) 1.5-1.8 x as wide as long, very slightly wider than mesosoma; entire head rather strongly transversely striated, sometimes smoother at mid part of frons. Head in frontal view 1.2-1.3 x as wide as high; antenna (Fig. 38) with A l hardly two-thirds as long as height of head; A9 about as long as wide. Mesosoma almost 1.7 x as long as wide, as high as wide. Sides of pronotum reticu­late-coriaceous, sometimes only in anterior corner, at most in slightly more than anterior half. Mesoscutum with very few hairs, dull, reticulate-coriaceous, medially and on inner part of lateral lobes with longitudinal striae or wrinkles, outer part of lateral lobes sometimes rather smooth; notauli complete, mid lobe posteriorly very slightly prolonged and somewhat blunt; scuto-scutellar grooves each with about six long hairs. Mesopleuron smooth. Scutellum (Fig. 39) with sparse hairs and more or less roughed reticulate-coriaceous, partly raised rugosity. Metapleuron with pilosity all over. Propodeal carinae short, parallel, slightly transverse area between them smooth and shiny. Fore wing just overreaching tip of metasoma, 0.7 x as long as body, 2.2 x as long as wide, clear, with fine and

moderately dense microtrichia; marginal cilia short. Hind wing 5.0 x as long as wide, with two hamuli; marginal cilia 0.2 width of wing. Metasoma (Fig. 40) about as long as head and mesosoma combined, fully 1.1 x as wide as mesosoma. T l with two weak, widely separated longitudinal carinae, almost smooth between them, laterally with dense and short pilosity. T2 with smooth basal foveae, medially with some weak striation which is not longer than T l . T3-T6 smooth except for faint reticulation at extreme margins, with superficially implanted hairs which form a medially inter­rupted transverse row on T3, a complete such row on T4 and T5.

Male - Length 1.4-1.8 mm. Antenna (Fig. 41 ) with flagellar pubescence hardly 0.4 x as long as width of segments.

Material examined - Holotype female: Mongolia, Southgobi aimak, 14 km SW of Somon, Bajandalaj, 1450 m, 15.VI.1967. Paratypes: 5 females, 6 males, same data as holotype; 1 female, Gobi Altaj aimak, Zachuj Gobi, 10 km N of Chatan chajrchan mountains, 1150 m, 27.VI. 1966.

Figs 37-46. 37—41 = Platygaster kaszabi sp. n.: 37 = female head in dorsal view, 38 = female an­tenna, 39 = female scutellum in lateral view, 40 = female metasoma in dorsal view, 41 = male an­tenna. A2-A6 = P. mongolica sp. n.: 42 = female head in dorsal view, 43 = female antenna, 44 = fe­

male scutellum in lateral view, 45 = female metasoma in dorsal view, 46 = male antenna

Remarks - The species is defined by the unique combination of characters: thick head with extensive striation, short antennae, and hardly striated T2.

Platygaster leptines W A L K E R , 1835

Material examined - 1 male, Central aimak, Tosgoni ovoo, 6-10 km N of Ulan-Baator, 1700 m, 7-8.VI.1968; 2 females, Bulgan aimak, 7 km NW of Somon Chanzargalant, 1350 m, 16.VI.1968; 3 females, Chövsgöl aimak, Alag Mort, 42 km NE of pass Chaldzan Sogotyn davaa, at river Tesijn gol, 1900 m, 14.VII.1968.

Platygaster cf. longestriolatus THOMSON, 1859

Material examined - 2 females, 4 males, Chövsgöl aimak, 8 km N of Somon Burenchaan, at river Delger mörön, 1450 m, 20.VI.1968.

Platygaster Imarchali KlEFFER, 1906

Material examined - 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1650 m, 3. V I . 1967; 1 female, Uvs aimak, between lake Örög nuur and Ulaangom, 2-7 km ESE of pass Ulaan davaa, 1690-1950 m, 28.VI.1968; 1 female, Zavchan aimak, Choit chunch, 26 km ENE of lake Telmen nuur, 2150 m, 13.VII.1968.

Platygaster marginata THOMSON, 1859

Material examined - 1 female, Bulgan aimak, between Somon Chischig-Öndör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.VI.1968.

Platygaster molsensis BUHL, 1995

Material examined - 1 female, Central aimak, Ulan-Baator, Zaisan in Bogdo ul, 1600 m, 6.VI.1966; 1 male, Bulgan aimak, 11 km W of Somon Bajannuur at lake Bajan nuur, 1000 m, 14.VI-24.VII. 1968.

Platygaster mongolica sp. n. (Figs 4 2 ^ 6 )

Female - Length 1.3-1.5 mm. Black, antennae hardly lighter; legs dark brown, boths ends of tibiae slightly lighter. Head from above (Fig. 42) 1.8 x as wide as long, as wide as mesosoma; occiput broadly rounded, finely but distinctly, transversely and somewhat unevenly reticulate-coriaceous; vertex distinctly reticulate-coriaceous; frons unevenly, distinctly, somewhat transversely reticu­late-coriaceous, medially smooth and impressed. OOL = LOL. Head in frontal view 1.3 x as wide as high; antenna (Fig. 43) with A l fully 0.8 x as long as height of head; A9 1.4 x as wide as long. Mesosoma hardly 1.4 x as long as wide, very slightly higher than wide. Sides of pronotum distinctly reticulate-coriaceous, not longitudinally so, smooth along broad hind margin. Mesoscutum virtually bare, shiny, distinctly reticulate; mid lobe medially and posteriorly more or less smooth, reticulation at least somewhat indistinct; lateral lobes smooth on outer half; mid lobe hardly prolonged towards scutellum, slightly blunt here; notauli strong and complete; scuto-scutellar grooves narrow, at most with a few hairs. Mesopleuron smooth. Scutellum (Fig. 44) with very few hairs, towards margins weakly and finely reticulate-coriaceous. Metapleuron with pilosity all over. Propodeal carinae paral­lel, their top surface with some microsculpture, area between them smooth, hardly as long as wide. Fore wing 0.9 x as long as body, 2.5 x as long as wide, almost clear, with dense microtrichia and short marginal cilia. Hind wing 6.1 x as long as wide, with two hamuli; marginal cilia 0.3 width of wing. Metasoma (Fig. 45) hardly as long as head and mesosoma combined, slightly wider than mesosoma. T l with two longitudinal carinae and some shorter keels. T2 striated in and between basal foveae to 0.4 of length. T3-T6 each with a complete, irregular or partly doubled, transverse row of moderately deeply implanted hairs; T3-T5 smooth, T6 partly dull.

Male - Length 1.4 mm. Antenna (Fig. 46) with flagellar pubescence at most half as long as width of segments.

Material examined - Holotype female: Mongolia, Bulgan aimak, 9 km E of Somon Abzaga, 1300 m, 23.VII.1966. Paratypes: 1 male, Chentej aimak, 7 km NE of Somon Mörön, 1200 m, 28-29.VII. 1965; 2 females, Suchebaator aimak, 44 km SSW of Baruun urt, 1050 m, 2-3.VIII. 1965: 1 female, Central aimak, Tosgoni ovoo, 5-10 km N of Ulan-Baator, 1500-1700 m, 19-24.VII.1967; I female, Central aimak, 11 km ESE of Somon Bajanzogt, 1600-1700 m, 26.VII.1968.

Remarks - Differs from P. misella BUHL, 2004 e.g. in having differently sculptured head, more transverse T l , and also rest of metasoma differently shaped, cf. BUHL (2004a). P. mongolica is somewhat similar to P. sterope WALKER, 1835,

but this species has occiput elevated in the middle, flagellum of female slightly more slender than in P. mongolica, top surface of propodeal carinae smooth, and T2 stronger striated than in P. mongolica, cf. V L U G (1985).

Platygaster lmunita W A L K E R , 1835

Material examined - 1 female, Cojbalsan aimak, 20 km SW of Somon Bajan-uul, 820 m, 18.VIII. 1965; 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1600-1750 m, 10.VI.1966; 11 females, Central aimak, about 30 km E of Somon Nalajch, 1530 m, 14.VI. 1966; 1 female, Arc-

hangaj aimak, Changaj mountains, between Somon Ichtamir and Somon Culuut, 20 km W of Ichta­mir, 2150 m, 20.VI.1966; 1 female. Central aimak, SE of Somon Bajanzogt, 1600 m, 27.VII.1966; 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1650 m, 3.VI. 1967; 1 female, Bajanchongor aimak, oasis Echin gol, 90 km NE of border post Caganbulag, 950 m, 27-28.VI.1967; 4 females, Central aimak, Bugijn az achuj in Bogdo ul. 36 km SW of Ulan-Baator, 1650 m, 10.VI.1968; 1 fe­male, Central aimak, 11 km ESE of Somon Bajanzogt, 1600 m, 13.VI.1968; 1 female, Bulgan aimak, between Somon Chischig-Öndör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.VI.1968; 1 female, Bulgan aimak, 7 km NW of Somon Chanzargalant, 1350 m, 16.VI.1968;2 females, Chövsgöl aimak, 6 km WNW of Somon Tosoncengel, 1480 m, 18.VI.1968; 1 female, Chövsgöl aimak, Alag Mort, 42 km NE of pass Chaldzan Sogotyn davaa, at river Tesijn gol, 1900 m, 14.VII.1968; 1 female, Central aimak, 11 km ESE of Somon Bajanzogt, 1600-1700 m, 26. V I I . 1968.

Platygaster nisus W A L K E R , 1835

Material examined - 1 female, Chövsgöl aimak, Alag Mort, 42 km NE of pass Chaldzan Sogotyn davaa, at river Tesijn gol, 1900 m, 14.VII.1968.

Platygaster nottoni B U H L , 1995

Material examined - 1 female, Central aimak, 126 km N of Ulan-Baator, at roads, 1100 m, 7.VII.1964.

Platygaster oebalus W A L K E R , 1835

Material examined - 2 females, Central aimak, Bugijn az achuj in Bogdo ul, 36 km SW of Ulan-Baator, 1650 m, 10.VI.1968.

Platygaster loscus W A L K E R , 1835

Material examined - 1 female, Central aimak, SE of Somon Bajanzogt, 1600 m, 5. V I I . 1964; 1 female, same locality but 27.VII.1966.

Platygaster otanes W A L K E R , 1835

Material examined - 1 female, 1 male, Central aimak, Ulan-Baator, Zaisan in Bogdo ul, 1600 m, 6.VI.1966; 4 females, 2 males, Central aimak, Songino, 24 km SW of Ulan-Baator, 1300 m, 7.VII. 1966; 1 female, Archangaj aimak, Changaj mountains, between Somon Ichtamir and Somon Culuut, 20 km W of Ichtamir, 2150 m, 20. V I . 1966; 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1650 m, 3.VI. 1967; 6 females, Bulgan aimak, between Somon Chischig-Öndör and Somon

Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.VI.1968; 2 females, Bulgan aimak, 7 km NW of Somon Chanzargalant, 1350 m, 16.VI. 1968; 1 female, Zavchan aimak, Choit chunch, 26 km ENE of lake Telmen nuur, 2150 m, 13.VII.1968; 1 female, Chövsgöl aimak, Alag Mort, 42 km NE of pass Chaldzan Sogotyn davaa, at river Tesijn gol, 1900 m, 14.VII. 1968.

Platygaster oviventris sp. n.

(Figs 47-50)

Female - Length 1.0-1.1 mm. Black; antennae, tegulae and legs dark brown, ends of tibiae and segments 1-4 of all tarsi more or less lighter brown. Head from above (Fig. 47) 2.0 x as wide as long, as wide as mesosoma, rather uniformly reticulate-coriaceous; occiput medially with a few transverse wrinkles, frons smooth medially. Head in frontal view 1.3 x as wide as high; antenna (Fig. 48) with A1 0.7 x as long as height of head, A9 1.1 x as long as wide. Mesosoma 1.2 x as long as wide, hardly higher than wide. Sides of pronotum reticulate-coriaceous, smooth along hind margin. Mesoscutum with few hairs, distinctly and uniformly reticulate-coriaceous; notauli complete but not strong; mid lobe posteriorly finely pointed but not prolonged; scuto-scutellar grooves narrow, almost bare. Mesopleuron smooth. Scutellum (Fig. 49) sculptured as mesoscutum, with very few hairs. Metapleuron with pilosity all over. Propodeal carinae very short, much transverse area between them unsculptured. Fore wing clear, hardly 0.9 x as long as body, 2.5 x as long as wide, with fine and dense microtrichia; marginal cilia at their longest 0.1 width of wing. Hind wing 5.6 x as long as wide, with two hamuli; marginal cilia 0.3 width of wing. Metasoma (Fig. 50) about as long as head and mesosoma combined, as wide as mesosoma. T l with two distinct, converging longitudinal keels, smooth between them. T2 smooth in basal foveae, between them striated to 0.3 length of tergite. T3-T6 smooth, T3-T5 each with a medially interrupted transverse row of superficially implanted hairs.

Material examined - Holotype female: Mongolia, Cojbalsan aimak, 50 km SE of Cojbalsan, 700 m, 16.VIII.1965. Paratypes: 1 female, same data as holotype; 1 female, Bulgan aimak, 11 km W of Somon Bajannuur at lake Bajan nuur, 1000 m, 24.VII.1968.

Remarks - In general body shape approaching P. leptoptera B U H L , 1999,

which however differs from P. oviventris in many respects, e.g. in having less

transverse head, no notauli, and more elongate wings, cf. BUHL (1999£>).

Platygaster cf. pedasus W A L K E R , 1835

Material examined - 1 female, Archangaj aimak, 20 km N of Charchorin, 1640 m, 1 .VI I . 1964; 1 female, Central aimak, about 30 km E of Somon Nalajch, 1530 m, 14.VI.1966; 1 male, Archangaj aimak, Changaj mountains, 8 km W of Somon Urdtamir, 1620 m, 21.VII. 1966; 1 female, Central aimak, 11 km S of pass Zossijn davaa, 90 km S of Ulan-Baator, 1650 m, 7.VI.1967.

Platygaster Ipelias WALKER, 1 8 3 5

Material examined - 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1600 m, 27.VIII.1965.

Platygaster polita THOMSON, 1 8 5 9

Material examined - 1 female, Central aimak, Tosgoni ovoo, 10 km S of Ulan-Baator, 1700-1900 m, 23-24.VII.1967; 6 females, Central aimak, 11 km ESE of Somon Bajanzogt, 1600-1700 m, 26.VII.1968.

Platygaster Ipuccinii V L U G , 1995

Material examined - 1 female, Central aimak, Ulan-Baator, Zaisan in Bogdo ul, 1600 m, 6.VI.1966.

Figs 4 7 - 5 4 . 47-50 = Platygaster oviventris sp. n., female: 47 = head in dorsal view, 48 = antenna, 49 = scutellum in lateral view, 50 = metasoma in dorsal view. 51-54 = P. striatipleura sp. n., female: 51 = head in dorsal view, 52 = antenna, 53 = scutellum in lateral view, 54 = metasoma in dorsal view

Platygaster rugosiceps B U H L , 1994

Material examined - 1 female, Central aimak, Tosgoni ovoo, 10 km N of Ulan-Baator, 1700-1900 m, 23-24.VII.1967; 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1500-1600 m, 21.VII. 1967; 1 female, Bulgan aimak, 7 km NW of Somon Chanzargalant, 1350 m, 16.VI.1968.

Platygaster sagana WALKER, 1835

Material examined - 1 female, Central aimak, about 30 km E of Somon Nalajch, 1530 m, 14. VI.1966; 2 females, Central aimak, 11 km S of pass Zossijn davaa, 90 km S of Ulan-Baator, 1650 m, 7.VI.1967; 2 females, Central aimak, Tosgoni ovoo, 6-10 km N of Ulan-Baator, 1700 m, 4.VI.1968; 2 females, Central aimak, Bugijn az achuj in Bogdo ul, 36 km SW of Ulan-Baator, 1650 m, 10. VI . 1968; 4 females, Central aimak, 11 km ESE of Somon Bajanzogt, 1600 m, 13.VI.1968; 1 fe­male, Bulgan aimak, between Somon Chischig-Öndör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.V1.1968; 1 female, Uvs aimak, SW shore oflake Uvs nuur, 63 km E of Ulaangom, 790 m, 26.VI.1968.

Platygaster signata (FÖRSTER, 1861)

Material examined - 1 female, Cojbalsan aimak, 50 km SE of Cojbalsan, 700 m, 16.VIII.1965; 2 females, Chovd aimak, 10 km SSW of Somon Bulgan, 1200 m, 4-5.VII.1966; 1 male, Chovd aimak, Mongol Altaj mountains about 45 km S of Somon Manchan, 2100 m, 9. VIL 1966; 1 female, Chovd aimak, pass between Zargalant chajrchan and Ömnö chajrchan mountains, 4-12 km from Naranbulag, 1800 m, 12. V I I . 1966; 1 female, 2 males, Central aimak, 12 km S of Somon Bajanbaraat, 1380 m, 9.VI. 1967; 3 females, Southgobi aimak, 14 km SW of Somon Bajandalaj, 1450 m, 15.VI. 1967; 1 female, Southgobi aimak, Tachilga ul, between Zogt-Ovoo and Dalanzadgad, 1550 m, 8.VII.1967; 1 female, Central aimak, Tosgoni ovoo, 10 km N of Ulan-Baator, 1700-1900 m, 23-24.VII. 1967; 7 females, Bulgan aimak, 11 km W of Somon Bajannuur at lake Bajan nuur, 1000 m, 14.VI.1968; 1 female, Chövsgöl aimak, 8 km N of Somon Burenchaan, at river Delger mörön, 1450 m, 20.VI. 1968; 1 female, Uvs aimak, SW shore oflake Uvs nuur, 63 km E of Ulaangom, 790 m, 26.VI.1968; 3 females, Bajan-Ölgij aimak, 20 km NNW of Ölgij, 2100 m, 2.VII. 1968.

Platygaster splendidula RUTHE, 1859

Material examined - 2 females, Archangaj aimak, Changaj mountains, between Somon Ichtamir and Somon Culuut, 20 km W of Ichtamir, 2150 m, 19. V I . 1966; 1 female, Central aimak, 11 km S of pass Zosijn davaa, 90 km S of Ulan-Baator, 1650 m, 7.VI.1967; 1 female, Central aimak, Bugijn az achuj in Bogdo ul, 36 km SW of Ulan-Baator, 1650 m, 10.VI.1968.

Platygaster striatipleura sp. n. (Figs 51-54)

Female - Length 1.9 mm. Black, antennae hardly lighter; legs dark brown, both ends of tibiae and segments 1—4 of all tarsi slightly lighter. Head from above (Fig. 51) 1.8 x as wide as long, very slightly wider than mesosoma; occiput and vertex roughly reticulate-coriaceous with scattered trans­verse wrinkles; frons distinctly reticulate-coriaceous between rather strong transverse fan-like striation. Head in frontal view 1.3 x as wide as high; antenna (Fig. 52) with A1 0.9 x as long as height of head, A9 1.8 x as long as wide. Mesosoma one and a third times as long as wide, as high as wide. Sides of pronotum dull, reticulate-coriaceous with longitudinal striae all over. Mesoscutum with few hairs, distinctly and uniformly reticulate-coriaceous (not longitudinally so) all over; admedian lines visible in anterior 0.4; notauli complete and deep; mid lobe posteriorly rather narrowly pointed but not reaching base of scutellum; scuto-scutellar grooves with very few hairs. Mesopleuron longitudi­nally striated in slightly more than upper half. Scutellum (Fig. 53) reticulate-coriaceous and with slightly raised rugosity, sparsely hairy. Metapleuron with pilosity all over. Propodeal carinae paral­lel, area between them as long as wide, smooth and shiny. Fore wing much damaged on unique speci­men, of normal proportions, almost clear and with rather long and dense microtrichia; marginal cilia short. Hind wing 5.3 x as long as wide, with three hamuli; marginal cilia 0.2 width of wing. Meta­soma (Fig. 54) as long as head and mesosoma combined, as wide as mesosoma. T l with two rather weak longitudinal keels medially and with some shorter carinae. T2 striated over whole width to about midlength, striae laterally continuing very finely to more than 0.6 of length. T3-T6 smooth, T3 laterally with rather deeply implanted hairs, T4-T6 each with a complete transverse row of such hairs.

Material examined - Holotype female: Mongolia, Central aimak, ca. 30 km E of Somon, Nalajch, 1530 m, 14.VI.1966.

Remarks - Most similar to P. lineaticeps BUHL, 1994, but this species differs from P. striatipleura e.g. in having scutellum not above level of mesoscutum, and T2 smooth, cf. also B U H L ( 1994/;). P. striatipleura runs to P. striolatus NEES, 1834 in KlEFFER's (1926) key, but is has distinctly more elongate flagellar segments than P. striolatus.

Platygaster tisias WALKER, 1835

Material examined - 1 female, Central aimak, SE of Somon Bajanzogt, 1600 m, 11. V I . 1966; 3 females, Zavchan aimak, Choit chunch, 26 km ENE of lake Telmen nuur, 2150 m, 13.VII.1968.

Platygaster zavchanensis sp. n. (Figs 55-58)

Female - Length 1.4 mm. Dull black, antennae, mandibles, tegulae and legs dark brown, both ends of all tibiae and segments 1-4 of all tarsi light brown. Head from above (Fig. 55) 2.2 x as wide as

long, 1.1 x as wide as mesosoma; occiput densely, rather finely and somewhat irregulary transversely striated; vertex and frons distinctly, somewhat roughly, transversely reticulate-coriaceous, on frons fan-like. OOL = LOL. Head in frontal view 1.3 x as wide as high; antenna (Fig. 56) with A1 as long as height of head; A9 fully twice as long as wide. Mesosoma one and a third times as long as wide, slightly more than 1.1 x as high as wide. Sides of pronotum dull, densely reticulate-coriaceous. Mesoscutum dull, slightly roughly reticulate-coriaceous, evenly and rather densely hairy, without

Figs 55-62. 55-58 = Platygaster zavchanensis sp. n., female: 55 = head in dorsal view, 56 = antenna, 57 = scutellum in lateral view, 58 = metasoma in dorsal view. 59-62 = Synopeas alatus sp. n., female: 59 = head in dorsal view, 60 = antenna, 61 = scutellum in lateral view, 62 = metasoma in dorsal view

notauli; hind margin medially with a small, smooth blunt prolongation reaching base of scutellum; scuto-scutellar grooves with dense, conspicuous hairs. Mesopleuron smooth. Scutellum (Fig. 57) at level of mesoscutum, slightly smoother than this, densely hairy, posteriorly almost vertical. Propodeal carinae short, area between them much transverse, unsculptured. Fore wing distinctly overreaching tip of metasoma, 0.8 x as long as body, 2.4 x as long as wide, almost clear, with fine and dense microtrichia; marginal cilia short. Hind wing 5.2 x as long as wide, with two hamuli; marginal cilia 0.3 width of wing. Metasoma (Fig. 58) nearly 1.1 x as long as head and mesosoma combined, 0.75 x as wide as mesosoma. T l with two strong longitudinal keels. T2 striated in basal foveae to 0.8 of length, medially smooth. T3-T5 smooth except for faint microsculpture along narrow hind mar­gins, T6 with some traces of microsculpture; T3 with three distinct hair-implantations on each side, T4-T5 each with a medially interrupted transverse row of deeply implanted hairs, T6 with a few hair-implantations.

Material examined - Holotype female: Mongolia, Zavchan aimak, Choit chunch, 26 km ENE of lake Telmen nuur, 2150 m, 13.VII. 1968.

Remarks - Differently sculptured than similar species such as P. danielssoni B U H L , 1998 and P. rufitibia B U H L , 1999. Scutellum rather similar to that of P.

abrupta BUHL, 1994 which has much shorter metasoma than P. zavchanensis, cf. B U H L (1994a, 1998/7, 1999a, 2003).

Platygaster spp.

Remarks - 2-3 species could not be placed but were too poorly characterised to be described as new.

Pyrgaspis haloxylonomyiae KOZLOV, 1967

Material examined - 4 females, Gobi Altaj aimak, Schargyn Gobi SE corner, 1130 m, 24.VI.1966; 1 male, Southgobi aimak, 100 km W of border post OvotChuural, 1250 m, 23.VI. 1967.

Synopeas alatus sp. n. (Figs 59-62)

Female-Length 0.9 mm. Black, A1-A6 and legs entirely and almost uniformly light yellowish brown. Head from above (Fig. 59) 1.9 x as wide as long, very slightly wider than mesosoma (15:14), without occipital carina, weak and in part slightly transversely reticulate-coriaceous; diameter of lat­eral ocellus hardly as long as OOL; OOL:LOL = 3:7. Head in frontal view wider than high (15:13); antenna (Fig. 60) with A1 shorter than height of head (11:13). Mesosoma 1.4 x as long as wide, very slightly higher than wide. Sides of pronotum weakly reticulate-coriaceous, smooth in lower 0.4 and along hind margin. Mesoscutum sparsely and evenly hairy, weakly reticulate-coriaceous, without

notauli; hind margin medially with a small, rounded, dark, smooth (not swollen) plate covering base of scutellum, laterally with a few long hairs. Mesopleuron smooth. Scutellum (Fig. 61) smooth, later­ally moderately hairy, posteriorly slightly semitransparent, with a short prolongation with a narrow lamella below. Metapleuron smooth and bare except for white, long pilosity medially and along hind margin. Propodeal carinae semitransparent, rather long, fused. Fore wing almost clear, 0.9 x as long as body, 2.8 x as long as wide, with fine and dense microtrichia; marginal cilia at their longest 0.1 width of wing. Hind wing 6.9 x as long as wide; marginal cilia slightly more than half the width of wing. Metasoma (Fig. 62) 1.1 x as long as mesosoma, fully as wide as this, about 1.6 x as wide as high, smooth and shiny except T6 which is somewhat dull; apical tergites with a few superficially im­planted hairs.

Material examined - Holotype female: Mongolia, Chövsgöl aimak, 3 km SW of Somon Buren-chaan, 1600 m, 21.VI-16.VII.1968.

Remarks - Differs from S. brevis BUHL, 1998 in lacking occipital carina, from S. zomborii B U H L , 2004 in having longer marginal cilia of fore wing, and from both in having smaller tooth on scutellum and more elongate fore wing. Cf. also B U H L (1998a, 2004/?).

Synopeas cryptus sp. n. (Figs 63-67)

Female - Length 1.1-1.4 mm. Black; antennae, mandibles and legs dark brown; base of tibiae and segments 1̂ 4- of tarsi lighter brown. Head from above (Fig. 63) 2.2 x as wide as long, 1.1 x as wide as mesosoma, distinctly and almost uniformly reticulate-coriaceous; occiput evenly rounded, without carina. OOL:LOL = 3:4. Head in frontal view 1.2 x as wide as high; antenna (Fig. 64) with A l 0.75 x as long as height of head. Mesosoma hardly 1.5 x as long as wide, 1.2 x as high as wide. Sides of pronotum reticulate-coriaceous all over, somewhat smoother along hind margin. Mesoscutum rather sparsely and evenly hairy, slightly weaker reticulate-coriaceous than head, with­out notauli; hind margin medially with a broad, blackish, slightly dull prolongation to base of scutellum; scuto-scutellar grooves with dense hairs. Mesopleuron with weak longitudinal sculpture in upper half, rest smooth. Scutellum (Fig. 65) faintly reticulate-coriaceous, medially with few hairs, laterally denser hairy, slightly angled posteriorly but without modifications, rarely with a small tooth indicated at posterior angle. Metapleuron smooth and shiny in about anterior third, rest with pilosity. Propodeal carinae low, dark, straight, fused. Fore wing 0.8 x as long as body, 2.4-2.5 x as long as wide, almost clear with fine and dense microtricia, without marginal cilia. Hind wing 5.1 x as long as wide; marginal cilia 0.3 width of wing. Metasoma (Fig. 66) as long as head and mesosoma combined, slightly wider than mesosoma, 1.25 x as wide as high. Hind margin of T2-T5 distinctly reticulate-coriaceous, T6 with such sculpture almost all over; T3-T6 with some fine hairs.

Male - Length 1.0-1.4 mm. Antenna (Fig. 67).

Material examined - Holotype female: Mongolia, Bulgan aimak, 30 km NNW of Somon Daschincilen, 1200 m, 15.VI.1968. Paratypes: 18 females, 5 males, same data as holotype.

Remarks - Most similar to S. koponeni B U H L , 2003 but with more transverse

head and female A8-A9, cf. also B U H L (2003).

Synopeas dentiscutellaris (SZABÓ, 1979)

Material examined - 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1500-1800 m, 22-23.VII. 1965; 1 female, 1 female, Suchebator aimak, river Bajan gol, 85 km NE of Somon Dari-ganga, 1100 m, 8.VIII. 1965; 1 female, Cojbalsan aimak. 50 km SE of Cojbalsan, 700 m, 16.VIII.1965; 1 female, Cojbalsan aimak, 20 km SW of Somon Bajan-uul, 820 m, 18.VIII.1965.

Synopeas gibberosus B U H L , 1997

Material examined - 1 female, Central aimak, 12 km W of Somon Lun, 1300 m, 3. V I I I . 1964; 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1600-1750 m, 10.VI.1966.

Figs 63-71. 63-67 = Synopeas cryptus sp. n.: 63 = female head in dorsal view, 64 = female antenna, 65 = female scutellum in lateral view, 66 = female metasoma in dorsal view, 67 = male antenna. 68-71 = S. kaszabi sp. n. female: 68 = head in dorsal view, 69 = antenna, 70 = scutellum in lateral

view, 71 = metasoma in dorsal view

Synopeas hyllus ( W A L K E R , 1835)

Material examined - 1 female, Suchebator aimak, 5 km NE of Somon Dariganga, 1150 m, 8.VIII. 1965; 2 females, Suchebator aimak, river Baján gol, 85 km NE of Somon Dariganga, 1100 m, 8.VIII.1965; 1 female, Bajan-Ölgij aimak, 20 km NNW of Ölgij, 2100 m, 2.VII. 1968.

Synopeas kaszabi sp. n. (Figs 68-71)

Female - Length 1.9 mm. Black, A1-A6 and fore legs yellowish brown; A7-A10 and coxae dark brown; mid femur dark brown, mid trochanter and tibia yellowish brown; hind femur and distal half of hind tibia dark brown, hind trochanter and basal half of hind tibia yellowish brown; segments 1-4 of all tarsi light brown, last segment dark brown. Head from above (Fig. 68) 1.8 x as wide as long, as wide as mesosoma, uniformly, finely but distinctly reticulate-coriaceous, occiput hardly with ca­rina but somewhat angled. OOL equal to diameter of lateral ocellus. Head in frontal view 1.1 x as wide as high; antenna (Fig. 69) with A l 0.9 x as long as height of head. Mesosoma 1.4 x as long as wide, 1.1 x as high as wide. Sides of pronotum finely reticulate-coriaceous all over. Mesoscutum with scattered hairs, with uniform sculpture hardly different from head, without notauli; hind margin medially with a small triangular, smooth prolongation (not swollen) just overreaching margin of scutellum; scuto-scutellar grooves with numerous long hairs. Mesopleuron smooth. Scutellum (Fig. 70) smooth and almost bare medially, laterally densely hairy, posteriorly with a small, dark tooth and a very narrow, brownish lamella below. Metapleuron with pilosity except along narrow anterior, smooth margin. Propodeal carinae fused, weakly semitransparent. Fore wing 0.7 x as long as body, 2.9 x as long as wide, slightly darkened and with dense microtrichia, hardly with marginal cilia. Hind wing with marginal cilia 0.2 width of wing. Metasoma (Fig. 71 ) 1.5 x as long as head and mesosoma combined, 1.1 x as wide as mesosoma, 1.4 x as wide as high. T2 smooth. T3-T5 each with a trans­verse stripe of rough reticulate-coriaceous sculpture around midlength, T6 with such sculpture except in posterior third; apical tergites with some superficially implanted fine hairs.

Material examined - Holotype female: Mongolia, Suchebaator aimak, 44 km SSW of Baruun urt, 1050 m, 2-3.VIII.1965.

Remarks - Characterised by the relatively long metasoma which, however, is less pointed at apex than in e.g. S. acuminatus KlEFFER, 1916 and S. muticus (NEES, 1834), cf. KlEFFER (1926).

Synopeas marttii B U H L , 2004

Material examined - 1 male, Chövsgöl aimak, 84 km W of Mörön, about 10 km NE of river Delger Mörön, 1650 m, 20.VI.1968.

Synopeas mongolicus sp. n. (Figs 72-74)

Female - Length 1.0 mm. Head black, rest of body with brownish tint; antennae, mandibles and legs lighter brown; trochanters, ends of tibiae and segments 1-4 of all tarsi lightest. Head from above (Fig. 72) 2.0 x as wide as long, nearly 1.2 x as wide as mesosoma, shiny, without occipital ca­rina, reticulate with rather large meshes which are hardly transverse on occiput, more so on vertex, even more so on frons, most so just above antennae. OOL equal to diameter of lateral ocellus. Head in frontal view 1.2 x as wide as high; antenna (Fig. 73) with A l 0.9 x as long as height of head. Mesosoma hardly 1.5 x s long as wide, nearly 1.2 x as high as wide. Sides of pronotum in upper half weakly reticulate with large meshes, rest smooth. Mesoscutum with sparse hairs, distinctly reticulate, smooth postero-medially, without notauli; hind margin medially with a narrow, dark (not swollen) prolongation to base of scutellum; scuto-scutellar grooves with numerous hairs. Mesopleuron smooth. Scutellum evenly rounded, shaped as in S. neglectus sp. n., cf. below, smooth, with a few hairs laterally. Metapleuron smooth and bare in more than anterior half. Propodeal carinae fused, slightly semitransparent. Fore wing just overreaching tip of metasoma, 2.8 x as long as wide, almost clear, with sparse and short microtrichia, without marginal cilia. Hind wing 5.9 x as long as wide; marginal cilia 0.3 width of wing. Metasoma (Fig. 74) 1.3 x as long as head and mesosoma combined, as wide as head, 1.5 x as wide as high. T2 smooth except for weak reticulation along hind margin; T3-T6 each with a transverse stripe of weak reticulation, with numerous superficially implanted hairs.

Material examined - Holotype female: Mongolia, Bajanchongor aimak, spring Talyn Bilgech bulag 47 km E of border post Caganbulag, 1200 m, 23.VI.1967.

Remarks - Differs from S. euryale (WALKER, 1835) e.g. in having smoothly rounded occiput, more convex scutellum, and relatively longer T2, cf. VLUG (1985). With regard to the closely related S. neglectus sp. n., cf. under this.

Synopeas Imyles (WALKER, 1835)

Material examined - 1 female, Cojbalsan aimak, 50 km SE of Cojbalsan, 700 m, 16. V I I I . 1965; 1 female, Central aimak, SE of Somon Bajanzogt, 1600 m, 11 .VI . 1966; 3 females, 2 males, Bulgan aimak, 30 km NNW of Somon Daschincilen, 1200 m, 15.VI.1968; 1 female, Bulgan aimak, between Somon Chischig-Öndör and Somon Orchon, 23 km NNE of Somon Chischig-Öndör, 1390 m, 15.VI.1968; 1 female, Uvs aimak, sand area Altan els, 35 km WNW of Somon Tes, 1400 m, 23 .VI . 1968.

Remarks - The specimens differ only from VLUG's (1985) description of S. myles in having weaker scutellar spine.

Synopeas neglectus sp. n. (Figs 75-78)

Female - Length 0.9-1.0 mm. Black, antennae and legs dark brown; base of all tibiae slightly lighter, segments 1-4 of all tarsi light brown. Head from above (Fig. 75) 2.0 x as wide as long, fully 1.1 x as wide as mesosoma, distinctly and almost uniformly reticulate, hardly transversely so; occiput evenly rounded, without carina; OOL equal to diameter of lateral ocellus. Head in frontal view 1.2 x as wide as high; antenna (Fig. 76) with A1 0.7 x as long as height of head. Mesosoma 1.4 x as long as wide, fully 1.1 x as high as wide. Sides of pronotum reticulate in upper half, rest smooth. Mesoscutum with sparse hairs, faintly reticulate-coriaceous, smoother posteriorly, without notauli; hind margin medially with a brownish, hardly swollen, prolongation to base of scutellum; scuto-scutellar grooves with rather dense, long hairs. Mesopleuron smooth. Scutellum (Fig. 77) me­dially smooth and bare, laterally densely hairy, evenly rounded. Metapleuron smooth and bare in about anterior third, rest with dense pilosity. Propodeal carinae short, dark and fused. Fore wing 0.75 x as long as body, 2.4 x as long as wide, clear, without marginal cilia. Hind wing 5.0 x as long as wide; marginal cilia slightly more than 0.4 width of wing. Metasoma (Fig. 78) as long as head and mesosoma combined, slightly narrower than mesosoma, 1.0 (holotype) to 1.4 x as wide as high. Hind margin of T2, and T3-T6 entirely, with faint reticulate microsculpture, sometimes almost smooth; apical tergites with some fine hairs.

Material examined-Holotype female: Mongolia, Bajanchongor aimak, oasis Echin gol, 90 km NE of border post Caganbulag, 95Ó m, 27-28. V I . 1967. Paratypes: 2 females, same data as holotype.

Figs 72-78.72-74 = Synopeas mongoliens sp. n. female: 72 = head in dorsal view, 73 = antenna, 74 = metasoma in dorsal view. 75-78 = S. neglectus sp. n. female: 75 = head in dorsal view, 76 = antenna,

77 = scutellum in lateral view, 78 = metasoma in dorsal view

Remarks - The two paratypes have metasoma distinctly less convex than

holotype. S. neglectus is similar to S. neuroteri KlEFFER, 1916, but antenna some­what differently shaped, cf. KlEFFER (1926, Fig. 274), especially A l of S. neglec­tus less curved (and darker). S. neglectus is close to S. mongolicus sp. n. but with

sculpture of frons more finely and uniformly reticulate, and more dull than in S. mongolicus which has sculpture stronger and exclusively transverse in lower 0.4; S. neglectus has also shorter, narrower and more convex metasoma and darker body appendages than in S. mongolicus, cf. above for further details.

Synopeas osaces (WALKER, 1835)

Material examined - 6 females, Bajanchongor aimak, Cagan Bogd ul, between Talyn bilgech bulag and Caganbulag, 25 km WSW of spring, 1450 m, 24.VI.1967; 12 females, Bajanchongor aimak, oasis Echin gol, 90 km NE of border post Caganbulag, 950 m, 27-28.VI.1968.

Synopeas rhanis (WALKER, 1835)

Material examined - 1 female, Chövsgöl aimak, 4 km NW of Mörön, 1500 m, 19. V I I . 1968.

Synopeas striatitergitis sp. n. (Figs 79-82)

Female - Length 1.4 mm. Black, antennae and legs dark brown; both ends of all tibiae, and all tarsi more or less light brown. Head from above (Fig. 79) 1.9 x as wide as long, 1.1 x as wide as mesosoma; occiput uniformly reticulate-coriaceous, rounded, without carina; vertex and frons more or less transversely reticulate-coriaceous. OOL twice the diameter of lateral ocellus. Head in frontal view 1.25 x as wide as high; antenna (Fig. 80) with A1 0.8 x as long as height of head. Mesosoma 1.4 x as long as wide, very slightly higher than wide. Sides of pronotum rather uniformly reticu­late-coriaceous (not longitudinally so) all over. Mesoscutum uniformly reticulate-coriaceous as occiput, sparsely hairy, with notauli weakly indicated almost to anterior margin; hind margin convex, mid lobe posteriorly rather narrow and very slightly prolonged and raised; scuto-scutellar grooves tri­angular, covered by numerous hairs. Mesopleuron smooth, with fine longitudinal striae in upper 0.3. Scutellum (Fig. 81) finely reticulate-coriaceous, medially weakly keeled, laterally rather densely hairy, posteriorly with a dark, narrow, almost vertical lamella. Metapleuron with whitish pilosity ex­cept in anterior and lower 0.5. Propodeal carinae short, low, parallel; area between them slightly transverse. Fore wing hardly 0.9 x as long as entire body, 2.6 x as long as wide, clear, with dense microtrichia; marginal cilia short. Hind wing 5.5 x as long as wide; marginal cilia 0.3 width of wing. Metasoma (Fig. 82) 1.2 x as long as head and mesosoma combined, about as wide as head, 1.4 x as wide as high. T l with several longitudinal keels. T2 densely striated to about 0.2 of length, rest of ter-

gite smooth. T3-T6 reticulate-coriaceous over most of surface, with some superficially implanted fine hairs.

Material examined - Holotype female: Mongolia, Chövsgöl aimak, 4 km NW of Mörön, 1500 m, 19.VII.1968.

Remarks - Characterised by the striated T2 which is almost always smooth in Synopeas spp.

Synopeas subtilis sp. n. (Figs 83-87)

Female - Length 1.3-1.5 mm. Black, antennae and legs dark brown; trochanters, both ends of fore and mid tibiae, basal half of hind tibia, and segments \-A of all tarsi yellowish brown. Head from above (Fig. 83) 2.0 x as wide as long, very slightly wider than mesosoma, almost uniformly and finely, distinctly reticulate-coriaceous, without transverse elements; occiput evenly rounded, without carina; OOL 2.0 x diameter of lateral ocellus; OOL and LOL about equal. Head in frontal view 1.25 x as wide as high; antenna (Fig. 84) with A l 0.75 x as long as height of head. Mesosoma 1.4 x as long

Figs 79-87. 79-82 = Synopeas striatitergitis sp. n. female: 79 = head in dorsal view, 80 = antenna, 81 = scutellum in lateral view, 82 = metasoma in dorsal view. 83-87 = S. subtilis sp. n. female: 83 = head in dorsal view, 84 = antenna, 85 = scutellum in lateral view, 86 = metasoma in dorsal view, 87 =

metasoma in lateral view

as wide, hardly 1.1 x as high as wide. Sides of pronotum distinctly and slightly longitudinally reticu­late-coriaceous all over. Mesoscutum evenly and moderately hairy, uniformly reticulate-coriaceous (slightly weaker than head), without trace of notauli; hind margin medially distinctly and broadly prolonged above anterior margin of scutellum, sometimes brownish here, laterally with dense, whit­ish hairs. Mesopleuron smooth, in upper 0.3 with faint longitudinal sculpture. Scutellum (Fig. 85) be­low level of mesoscutum, with sparse hairs (somewhat denser postero-laterally) and faint microsculpture, posteriorly with at most a weak indication of a tooth, slightly excavated below, dark, without lamella. Metapleuron smooth and bare in about anterior 0.4, rest with dense, whitish pilosity. Propodeal carinae very slightly semitransparent, almost fused. Fore wing 0.75 x as long as body, 2.3 x as long as wide, clear, with moderately dense, fine microtrichia, without marginal cilia. Hind wing 5.4 x as long as wide; marginal cilia 0.2 width of wing. Metasoma (Figs 86-87) 1.0-1.1 x as long as head and mesosoma combined, as wide as mesosoma, about 1.1 x as wide as high. Hind margins of T2-T5, and entire T6, finely reticulate-coriaceous; apical tergites with a few superficially implanted hairs, almost forming a transverse row on T5; T6 0.6-0.8 x as long as wide. Sternite 2 reticu­late-coriaceous in posterior 0.4.

Material examined - Holotype female: Midgobi aimak, Choot bulag, between Chuld and Delgerchangaj, 1480 m, 13.VII.1967. Paratypes: 5 females, same data as holotype.

Remarks - Close to S. rhanis (WALKER, 1835) but with less pointed scutel­lum and less pointed and less convex metasoma than this, cf. V L U G (1985). Meta­soma also less convex than in S. dentiscutellaris (SZABÓ, 1979) and shape of scu­tellum different from this, cf. BUHL (2000).

Synopeas trebius (WALKER, 1835)

Material examined - 1 female, Central aimak, Uubulan at river Tola, 60 km E of Ulan-Baator, 1370 m, 25.VIII.1965; 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1600 m, 27.VIII. 1965; 1 male, Central aimak, Tosgoni ovoo, 10 km N of Ulan-Baator, 1700-1900 m, 23-24. V I I . 1967.

Synopeas vulgaris sp. n. (Figs 88-92)

Female - Length 1.1-1.4 mm. Black, A1-A6 medium to dark yellowish brown; legs medium to dark brown; trochanters, tip of femora, both ends of fore tibia, base of mid and hind tibiae, and seg­ments 1-4 of all tarsi light brownish. Head from above (Fig. 88) 1.7-1.9 x as wide as long, very slightly wider than mesosoma, finely and almost uniformly reticulate-coriaceous, without transverse elements; occiput with a weak carina. OOL about as long as diameter of lateral ocellus; LOL = 4 OOL. Head in frontal view 1.2 x as wide as high; antenna (Fig. 89) with A l 0.9 x as long as height of head. Mesosoma 1.4 x as long as wide, 1.1 x as high as wide. Sides of pronotum reticulate-coria­ceous, smooth in lower third. Mesoscutum moderately and evenly hairy, uniformly reticulate-coriaceous slightly weaker than head, without notauli; hind margin medially with a smooth (not swollen) prolongation to base of scutellum; scuto-scutellar grooves broadly triangular, each with

about seven long hairs. Mesopleuron smooth. Scutellum (Fig. 90) medially almost smooth and bare, laterally densely hairy, posteriorly with a low longitudinal keel, above anterior edge of propodeal carinae forming a fine, brownish lamella. Metapleuron smooth and bare in about anterior 0.3, rest with whitish pilosity. Propodeal carinae hardly semitransparent, weakly curved, fused. Fore wing 0.8 x as long as body, 2.4 x as long as wide, faintly yellowish, with fine and dense microtrichia, without marginal cilia. Hind wing 5.3 x as long as wide; marginal cilia fully 0.2 width of wing. Metasoma (Fig. 91) 0.9 x to about as long as head and mesosoma combined, as wide as head, 1.5 x as wide as high. Hind margin of T2-T5 reticulate-coriaceous, T6 with such sculpture all over; apical tergites with some fine hairs, forming a transverse row on T5; T6 less than half as long as its basal width.

Male - Length 1.1-1.3 mm. Antenna (Fig. 92) with flagellar pubescence very short.

Material examined - Holotype female: Mongolia, Bulgan aimak, 30 km NNW of Somon Daschincilen, 1200 m, 15.VI.1968. Paratypes: 51 females, same data as holotype; 1 female, Bulgan aimak, 9 km E of Somon Abzaga, 1300 m, 23.VII.1966; 1 female, Bulgan aimak, 11 km W of Somon Bajannuur at lake Bajan nuur. 1000 m, 14.VI-24.VII. 1968; 1 male, Bulgan aimak. 7 km NW of Somon Chanzargalant, 1350 m, 16.VI. 1968; 1 female, Central aimak, Onzulin chundi, lOOkmSWof Ulan-Baator, 1400 m, 15.VI.1964; 1 female, Central aimak, 12 km W of Somon Lun, 1300 m, 3.VIII. 1964; 1 female, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1600 m, 27.VIII.1965; 1 female, Central aimak, 12 km S of Somon Bajanbaraat, 1380 m, 13.VII.1967; 2 females, Chentej aimak, Candagan tal, 40 km E of Somon Zargaltchaan, 1300 m, 28.VII.1965; 1 male, Archangaj aimak, Changaj mountains, 8 km W of Somon Urdtamir, 1620 m, 21. V I I . 1966; 1 female, Southgobi aimak, Gurban Sajchan ul, 15 km S of Dalanzadgad, 1750 m, 13.VI.1967; 2 males, Chövsgöl aimak, 8 kmN of Somon Burenchaan, at river Delger mörön, 1450 m, 20.VI and 16.VII.1968; 1 female, Chovd aimak, Mongol Altaj mountains, about 45 km S of Somon Manchan, 2100 m, 9.VII.1966; 1 female,

Figs 88-92. Synopeas vulgaris sp. n.: 88 = female head in dorsal view, 89 = female antenna, 90 = fe­male scutellum in lateral view, 91 = female metasoma in dorsal view, 92 = male antenna

Suchebator aimak, river Baján gol, 85 km NE of Somon Dariganga, 1100 m, 8.VIII. 1965; 1 female, Midgobi aimak, Choot bulag, between Chuld and Delgerchangaj, 1480 m, 13.VII.1967; 1 male, Bajanchongor aimak, Cagan Bogd ul, Tooroin bulag 13 km E of border post Caganbulag, 1500 m, 24^1.1967^.

Remarks - Close to S. euryale (WALKER, 1835), but this species has female A5 not longer than A6, scutellum in lateral view less convex, propodeal carinae more convex, and it has female T3-T6 longer and T6 less transverse than S. vulgaris, cf. V L U G (1985). S. vulgaris differs from S. involulus KlEFFER, 1926 e.g. in sculpture of head, and from S. daucicola KlEFFER, 1916 in having A8-A9 trans­verse, and from both last mentioned species in length of OOL, cf. KlEFFER ( 1926).

Synopeas spp.

Remarks - A couple of species very similar to S. deniiscutellaris (SZABÓ,

1979), S. hyllus (WALKER, 1835) etc. were not placed, as well as a couple of spe­cies similar to S. vulgaris sp. n. Further material is needed to be more certain of their status.

Trichacis sp.

Material examined - 1 male, Central aimak, Ulan-Baator, Nucht in Bogdo ul, 1650-1950 m, 4.VI.1966.

Acknowledgements -1 thank Mr. SÁNDOR CSŐSZ, Hungarian Natural History Museum, Buda­pest (Hungary), very much for the loan of specimens.

REFERENCES

BUHL, P. N. (1994a): Three new species of Platygaster Latreille, 1809, from Denmark (Hymeno­ptera, Platygastridae). - Entomofauna 15: 77-84.

BUHL, P. N. (1994Ö): Three new species of Platygaster Latreille, 1809 from Europe (Hymenoptera, Platygastridae). - Entomofauna 15: 329-336.

BUHL, P. N. (1998a): Five new species of Platygastroidea from Norway (Hymenoptera). - Entomo-logica Fennica 8: 197-204.

BUHL, P. N. (19986): On some new or little known NW European species of Platygastridae (Hyme­noptera, Proctotrupoidea). - Fragmenta entomologica 30: 295-334.

BUHL, P. N. (1999a): A synopsis of the Platygastridae of Fennoscandia and Denmark (Hymenoptera, Platygastroidea). - Entomofauna 20 : 17-52.

BUHL, P. N. (19996) Platygastridae (Hymenoptera) species of a Juniperus thurifera L. forest of Los Mo-negros region (Zaragoza, Spain). - Zapateri, Revista Aragonesa de Entomologia 8 [ 1998]: 11-42.

B U H L , P. N . (2000): Haustagaster Szabó, 1979 new synonym of Synopeas Förster, 1856, with redescriptions of four species (Insecta: Hymenoptera: Proctotrupoidea: Platygastridae). -Reichenbachia 33: 415^-19.

B U H L , P. N. (2003): New or little known Palaearctic species of Platygastrinae (Hymenoptera: Platy­gastridae). - Entomologica Fennica 14: 109-117.

B U H L , P. N. (2004a) Key to Platygaster spp. (Hymenoptera, Platygastridae) in Denmark, with de­scriptions of new species. - Steenstrupia (in press).

B U H L , P. N . (20046): Ten new Palaearctic species of Platygastrinae (Hymenoptera, Platygastridae). - Entomofauna (in press).

HUGGERT, L. (1973): Taxonomical studies on Platygastridae (Hym. Proct.). - Entomologisk Tidskrift 94: 97-108.

KlEFFER, J. J. (1926): Hymenoptera Proctotrupoidea. Scelionidae. Das Tierreich 48. - Walter de Gruyter & Co., Berlin-Leipzig, 885 pp.

KOZLOV, M. A. (1972): Palearkticheskiy predstavitel' roda Sceliotrachelus Brues, 1908 (Hymeno­ptera, Platygastridae) iz Mongolskoy Narodnoy Respubliki. (A Palearctic species of the genus Sceliotrachelus Brues, 1908 (Hymenoptera, Platygastridae) from the Mongolian People's Re­public.) - Entomologicheskoe Obozrenie 5 1 : 133-135.

KOZLOV, M. A. (1974): K faune proctotrupoidnykh naezdnikov (Hymenoptera, Proctotrupoidea) Mongolskoy Narodnoy Respubliki. I I . Rody Isostasius Förster, Inostemma Haliday (Platy­gastridae). (On the fauna of Proctotrupoidea (Hymenoptera) of the Mongolian People's Re­public. I I . Isostasius Förster, Inostemma Haliday (Platygastridae).) - Nasekomye Mongolii 2: 277-281.

KOZLOV, M . A. (1975ű): Novyy palearkticheskiy rod semeystva Platygastridae (Hymenoptera, Proctotrupoidea) iz Mongolii. (A new Palearctic genus of the family Platygastridae (Hymeno­ptera, Proctotrupoidea) from Mongolia.) - Zoologicheskii zhurnal 54 : 965-967.

KOZLOV, M. A. (19756): K faune proctotrupoidnykh naezdnikov (Hymenoptera, Proctotrupoidea) Mongolskoy Narodnoy Respubliki. I I I . Novyy rod Stosta Kozlov, gen. n. iz sem. Platygast­ridae. (On the fauna of Proctotrupoidea (Hymenoptera) of the Mongolian People's Republic. I I I . A new genus Stosta Kozlov, gen. n. (Platygastridae).) - Nasekomye Mongolii 3: 310-313.

KOZLOV, M . A. (1978): Nadsem. Proctotrupoidea - Proktotrupoidnye naezdniki. [Superfamily Proc­totrupoidea.] - I n : MEDVEDEV, G. S. (ed.): OpredeliteV nasekomykh evropeyskoy chasti SSSR. Tom III. Pereponchatokrylye. Vtoraya chast'.[Identification of the insects of the European part of the USSR. Vol. 3. Hymenoptera. Second part.] Nauka, Leningrad, pp. 538-664.

SZABÓ, J. B. (1979): New species of the Mongolian Proctotrupoid fauna (Hymenoptera: Procto­trupoidea, Ceraphronoidae, Diapriidae and Platygasteridae). - Folia entomologica hungarica 32: 177-179.

SZELÉNYI, G. (1938): Über Paläarctische Scelioniden. I . Zur Systematik der Gattung Inostemma Walk. -Annales historico-naturales Musei nationalis hungarici, Pars zoologica 3 1 : 108-128.

SZELÉNYI, G. (1958): Über einige durch Zucht erhaltene Scelioniden und Bethyliden (Hymeno­ptera). - Annales historico-naturales Musei nationalis hungarici 50 : 261-270.

TOMSÍK, B. (1950): Chechoslovak Inostemmini. The parasites of Cecidomyidae. - Folia Entomolo­gica 13: 49-64.

V L U G , H. J. (1985): The types of Platygastridae (Hymenoptera, Scelionoidea) described by Haliday and Walker and preserved in the National Museum of Ireland and in the British Museum (Natu­ral History). 2. Keys to species, redescriptions, synonymy. - Tijdschrift voor Entomologie 127: 179-224.