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

Fall Fund Drive


Family Nemestrinidae - Tangle-veined Flies

Fly - Neorhynchocephalus volaticus - female Fly - Neorhynchocephalus volaticus - male Bee Fly??? - Neorhynchocephalus sackenii - female Bee Fly??? - Neorhynchocephalus sackenii Nemestrinidae - Tangle-veined Fly - Neorhynchocephalus volaticus Nemestrinidae - Tangle-veined Fly - Neorhynchocephalus volaticus Unknown Bee Bly - Neorhynchocephalus volaticus Tiny bee near ground, foraging on Hedge Parsley
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Family Nemestrinidae (Tangle-veined Flies)
Explanation of Names
Nemestrinidae Griffith & Pidgeon 1832
6 spp. in 3 genera in our area(1), 300 spp. in 26 genera total(2)
Our spp. 7-14 mm(1)
Bee-like appearance and loud buzz. Bristles lacking but body is covered with hair-like setae. Branches of the medial vein join before the apical margin and end toward the front margin of the wing before the apex.
s. & w. US; BC(1); most diverse and common in sw. US
Adults frequent flowers
Life Cycle
Most are endoparasitoids of grasshoppers(1), Hirmoneurinae parasitize scarab beetles(3)
Rare in NA. Some are considered important in the control of grasshopper populations.
Print References
Bequaert J. (1930) Notes on American Nemestrinidae. Psyche 37:286-298 (Full text)
Bequaert J. (1934) Notes on American Nemestrinidae, second paper. J. New York Ent. Soc. 42: 163-184 (First page)