Aquatic Insects of Michigan
Ethan Bright, Museum of Zoology Insect Division and School of Natural
Resources and Environment
Athericidae, Atherix - Snipe Flies
Atherix Meigen is one of two Nearctic genera, and the only one found in Michigan. (Suragina Walker is found in southwestern Texas south, and is known to bite both man and other mammals)(Courtney et al. 1995, Webb 1977). Two species have been documented in Michigan. A. variegata Walker, which is commonly found in trout streams in the northern part of the Lower Peninsula, and A. lantha Webb in the southeastern Lower Peninsula. The former species is widespread in the north-central part of North America, from South Dakota east to central Indiana, north to the shore of Hudson Bay (Webb 1977).
Larvae are usually burrowers and most commonly found within the substrate of riffles. They are predaceous on other invertebrates, principally chironomids and small mayflies. They are typically are found in cooler streams and rivers throughout the state. Pupation usually occurs in the soil along the stream's edge (Webb 1981). After mating, adult females congregate to oviposit egg masses on overlying vegetation and under bridges over streams and rivers (Figure). Eggs are adhered on to an overlying structure, and the females die thereafter (dead females are frequently found among the egg masses). Larvae hatch from the eggs and fall into the stream where they develop and eventually pupate.
Key to Adults (from Webb 1977)
Courtney GW, Merritt RW, Teskey HJ, Foote BA. 1995. Aquatic Diptera. Part One. Larvae of Aquatic Diptera, pp. 484-548 in Merritt RW, Cummins KW, An Introduction to the Aquatic Insects of North America, Third Edition. Kendall/Hunt Publishing Company, Dubuque, Iowa, USA.
Page created: April 10, 2006 - Last updated: April 11, 2006 (EB)