Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12


Previous events


TaxonomyBrowse
Info
ImagesLinksBooksData

Family Therevidae - Stiletto Flies

Unkonwn Stiletto Fly - Ozodiceromyia notata Flying insect on a bush, eastern slope of Mt. Rose, in Galena Creek Park. - Thereva Maybe a mimic of somekind? Tabuda varia ? Ozodiceromyia nigrimana? - male - female Stiletto Fly ? - male Florida long fly - Penniverpa festina - female An Acrosathe with white halter knobs? - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Superfamily Asiloidea
Family Therevidae (Stiletto Flies)
Explanation of Names
Therevidae Newman 1834
see Thereva
Common name refers to narrow, tapering abdomen
Numbers
~150 spp. in 30 genera in our area(1), >1,600 spp. in >120 genera of 4 subfamilies worldwide(2)
catalog in(3)
Size
2.5-15 mm(1)
Identification
Usually gray flies with moderately tapering abdomen. Five posterior cells with the fourth sometimes closed. Antennomere 3 somewhat elongated.(4)
Larvae:
Range
cosmopolitan, most diverse in Australia(6)
Habitat
usually open areas: adults on foliage, flowers, dry ground along sandy areas; larvae in sand or decaying wood(1)
Food
Adults are nectar feeders; larvae prey on soil arthropods(2)
See Also
similar to robber flies (Asilidae) but without the beard, have more slender legs and no depression between the eyes(1)
Works Cited
1.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
2.Stiletto Flies of the World
3.An annotated catalogue of the New World Therevidae (Zootaxa 3600 (1): 001 – 105 )
DONALD W. WEBB, STEPHEN D. GAIMARI, MARTIN HAUSER, KEVIN C. HOLSTON, MARK A. METZ, MICHAEL E. IRWIN, GAIL E. KAMPMEIER & KRISTIN. 2013. Magnolia Press.
4.A Field Guide to Insects
Richard E. White, Donald J. Borror, Roger Tory Peterson. 1998. Houghton Mifflin Co.
5.Therevidae home page
6.Australian Faunal Directory