Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Hybomitra difficilis

BG718 C7333 - Hybomitra difficilis - female BG853 C7874 - Hybomitra difficilis - female BG853 C7874 - Hybomitra difficilis - female BG853 C7874 - Hybomitra difficilis - female Deer/Horse Fly? - Hybomitra difficilis Horse Fly - Hybomitra difficilis - female Horse Fly - Hybomitra difficilis - female Unknown Tabanid - Hybomitra difficilis
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Infraorder Tabanomorpha
Family Tabanidae (Horse and Deer Flies)
Subfamily Tabaninae (Horse Flies)
Tribe Tabanini
Genus Hybomitra
Species difficilis (Hybomitra difficilis)
Explanation of Names
Hybomitra difficilis (Wiedemann 1828)
Size
~13 mm(1)
Identification
Eyes apparently bare; subcallus denuded & shining(1)
Range
e US (VT-FL to IL-OK)(1)(2)
Season
May-Jul in WV(3)
Remarks
Drees et al.(3) regard it as common, and a serious pest; Pechuman et al.(1) consider it generally uncommon, but sometimes locally abundant.
Works Cited
1.The Diptera, or true flies, of Illinois I. Tabanidae
Pechuman, L.L., D.W. Webb, & H.J. Teskey. 1983. Illinois Natural History Survey Bulletin 33: 1-121.
2.A Catalog of the Diptera of America North of Mexico
Alan Stone, et al. 1965. United States Department of Agriculture.
3.Horse flies and deer flies of West Virginia: an illustrated key (Diptera, Tabanidae)
Drees, B.M., L. Butler, and L.L. Pechuman. 1980. West Virginia University Agricultural and Forestry Experiment Station Bulletin 674.