Chalcosyrphus nemorum (Fabricius) (Diptera; Syrphidae) in Quoile Wood, Co DownAuthor(s): R. AndersonSource: The Irish Naturalists' Journal, Vol. 21, No. 10 (Apr., 1985), p. 463Published by: Irish Naturalists' Journal Ltd.Stable URL: http://www.jstor.org/stable/25538928 .

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Ir.Nat. J. Vol. 21 No. 101985 463

FIELD RECORDS ? INSECTS

Records for inclusion in this section should be sent to Dr J. P. O'Connor, National Museum of

Ireland, Dublin 2.

CHALCOSYRPHUS NEMORUM (FABRICIUS) (DIPTERA; SYRPHIDAE) IN QUOILE WOOD, CO DOWN

The only published Irish record of this rare hoverfly is for deciduous woodland at Enniskerry, Co

Wicklow (Speight, M. C. D. et al. 1975 Proc. R. Ir. Acad. 75B: 1-80). Stubbs, A. E. and Falk, S. J.

(1983 British hoverflies. British Entomological and Natural History Society, London) describe it as

local and rarely common in Great Britain, mostly in the south but extending north into Scotland. The

following record for a northern locality in Ireland is therefore of some interest. Habitat data

correspond closely with the brief details given by Stubbs and Falk (op. cit.).

Down: Quoile Wood J485463, 20 July and 11 August 1984, Id"; on or near the fallen stump of a large beech (Fagus) in mixed, mainly oak (Quercus robur) woodland.

On the occasion of the first sighting, a d* was captured while resting on beech bark in dappled shade. It was narcotised and photographed but subsequently recovered and escaped. On the second

occasion a single cf was captured within a metre's radius of the first sighting on the bare wood of

stacked beech faggots. This was retained for examination and appeared identical, from comparison of

the pattern of wing damage, to the cf in the original photograph. No $ J or additional cfcf were seen

on either occasion here or elsewhere in the wood despite a prolonged search although other Xylotini were abundant (Xylota segnis (L.) and X. sylvarum (L.)),

225 Saintfield Road, Belfast BT8 4PS. R. ANDERSON

AMARA FULVA (MULLER) (COLEOPTERA, CARABIDAE) ON LOUGH NEAGH Amara fulva (Muller) is a ground-beetle known to be stenotopic for sparsely vegetated

loose-sand habitats (Freude, H. et al. 1976 Die Kafer Mitteleuropas. 2: 236) and is, or was, locally common in suitable places round the Irish coast (Johnson, W. F. and Halbert, J. N. 1902 Proc. R. Ir.

Acad. (3)6: 573), usually on the loose sand of fore-dunes just above high-water mark. In Great Britain

it has occasionally been recorded inland in sand-pits and on the Continent on the shorelines of major rivers such as the Rhine. On 15 August 1981.1 took a single 9 under driftwood on loose, sterile sand

15m from the shoreline of Lough Neagh at a sand-washing plant south of Toome, Co Londonderry (H980902). The habitat is a varied one and supports large populations of the Lough Neagh

'specialities' Dyschirius obscurus (Gyllenhal) (Carabidae) and Bledius annae Sharp (Staphylinidae) in damp sand at the water's edge. A single Cj oi A. fulva was subsequently found (12 July 1983) in a

very similar habitat just east of Shane's Castle, Co Antrim (J 120879), also under driftwood on loose

sand behind the Lough Neagh shore-line. Because of disturbance through recreational use of its

preferred habitat, the species may have declined in British coastal localities, particularly in the south

(Lindroth, C. H. 1974 Handbk. Ident. Br. Insects. 4(2): 92) but the situation in Ireland is unknown.

However, it does not appear to have been recorded from any coastal site in the northern half of Ireland

since Johnson and Halbert's time and the Lough Neagh records are the first for an inland locality in the

island as a whole.

225 Saintfield Road, Belfast BT84PS. R. ANDERSON

THE IRISH SPECIES OF RHINOPHOR1DAE (DIPTERA) The Rhinophoridae are small, slender, black or dark greyish flies with, often, wings heavily

suffused or marked black. The larvae are parasitic in terrestrial Isopoda (woodlice). Of the ten British

species (Smith, K. G. V. 1976 Handbk. Ident. Br. Insects. 11(5): ix-139 pp.), three are known from

Ireland, only one of which Melanophora roralis (L.) is reported as Irish in the standard British text

(Emden, F. I. van 1954 Handbk. Ident. Br. Insects. 10(4a): 1-133). Records of Irish Rhinophoridae are as follows:?

Tricogena ribricosa (Meigen) Wicklow: Bray Head, leg E. O'Mahony, 8.6.1931, emerged 26.6.1931 ex pupa in dried skin of

Porcellio scaber (Latreille). The adult which is in the National Museum of Ireland (NMI) was

determined by D. Aubertin. (O'Mahony, E. 1931 Entomologist's mon. Mag. 67: 182; Stelfox, A. W.

S. 1931 Ir. Nat. J. 3: 232).

Fermanagh: White island H2049, leg C. Reid 29.9.1977, deciduous woodland, det R. Nash.

Antrim: Cave Hill, Belfast J3279, leg R. Nash 24.8.1982. deciduous woodland, det R. Nash.

T. rubricosa is an uncommon but generally distributed species in Great Britain. The O'Mahony record

is of considerable interest since usually T. rubricosa is associated with Oniscus asellus (L.).

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