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

Species Atylotus calcar

Big Fly - Atylotus calcar Horse Fly - Atylotus calcar Horse Fly - Atylotus calcar - female
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 Atylotus
Species calcar (Atylotus calcar)
Explanation of Names
Atylotus calcar Teskey 1983
Identification
Female: frons with glossy calli present; body not almost completely white; abdomen not broadly orange laterally; pale hairs of body white to creamy white; abdomen with large median and sublateral white-haired patches on each tergite; fork of R4+5 with long stump/spur vein/appendix; apical flagellomeres darker than basal flagellomere (1).
Male: postocular fringe of hairs short, a little if at all longer than eye hairs; body not almost completely white; first 6 abdominal tergites without the lateral third orange; fork of R4+5 with long stump/spur vein/appendix; apical flagellomeres darker than basal flagellomere (1).
Range
YT-MB-AZ-CA
Remarks
Larvae are known from wet soils at or near alkaline "sloughs".
Print References
Teskey H.J. (1983) A review of the Atylotus insuetus group from western North America including description of a new species and immature states (Diptera: Tabanidae). Can. Entomol. 115: 693-702. (Full text)
(2)
Works Cited
1.The horse flies and deer flies of Canada and Alaska (Diptera: Tabanidae)
Teskey H.J. 1990. The insects and arachnids of Canada, Pt. 16. Ottawa: Agriculture Canada. 381 pp.
2.A revision of eastern North American species of Atylotus (Diptera: Tabanidae) with keys to adult and immature stages
Teskey H.J. 1984. Proc. Ent. Soc. Ontario 144: 21-43.