Entomology 462 Orders of Insects David J. Shetlar, Ph.D. The BugDoc The Ohio State University, OARDC & OSU Extension Columbus, OH Revised: September, 2007.
Mayflies Order: Ephemeroptera. Life Cycle Hemimetabolous (egg, naiad, adult) –Naiad: aquatic, gill-breathing nymph –Nymph: larva of an insect without.
