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For Insects, Spiders & Their Kin
For the United States & Canada
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Fall Fund Drive


Family Athericidae - Watersnipe Flies

Fly larva - Atherix pachypus Big Springs mystery fly - male? - Suragina concinna - male Atherix lantha Atherix lantha Athericidae? - Atherix pachypus Watersnipe Fly Larva - Atherix lantha Dipteran 'death ball' - Atherix another possible athericid - Atherix - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Infraorder Tabanomorpha
Family Athericidae (Watersnipe Flies)
Other Common Names
Ibis Flies
Synonyms and other taxonomic changes
formerly treated as part of Rhagionidae
Explanation of Names
Athericidae Nowicki 1873
5 spp. in 2 genera in our area(1), >130 spp. in 12 genera total(2)
Adult: costa extends around entire wing; wings patterned; lower calypter much reduced or absent; stout tapered abdomen; longish legs; 1st & 2nd antennal segments doughnut-shaped, last (3rd) segment with long bristle; tibiae spurred; feet with triple pad beneath tarsal claws
Larva: 7 pairs of abdominal prolegs and a single proleg on the last segment; lack true head; long fleshy filaments extend from hind end; short filaments protrude from each side of each abdominal segment
Larvae found in pristine streams, adults nearby
larvae are aquatic and either predaceous on other invertebrates or saprophagous in wooden debris, submerged timbers, etc.; some adults are predaceous, but females of at least some species of 3 genera are blood feeders(3)(4)(5)