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For the United States & Canada
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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


Genus Chrysops

Tabanidae? - Chrysops noctifer - female Deer Fly - Chrysops sp.? - Chrysops discalis - female Fly - Chrysops - male Deer Fly - Chrysops - Chrysops dimmocki - female Tabanidae - Chrysops virgulatus - female surprise female deer fly attracted to MV lamp - Chrysops - female Chrysops flavidus - Chrysops - female deer fly? - Chrysops - male
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 Chrysopsinae (Deer Flies)
Tribe Chrysopsini
Genus Chrysops
Explanation of Names
Chrysops Meigen 1803
'golden eye'
>100 spp. in 2 subgenera in our area (all but C. (Liochrysops) hyalinus are in the nominate subgenus)(1)
A key to nearly all species north of Mexico as of 1935 was written by Brennan (1935).

These views should make it possible to identify every Deer Fly in our area:
view showing dorsal head, thorax, abdomen; also wing pattern
lateral view showing, antennae, thorax, leg colour
face view showing frontal callus (black oval between eyes), frontoclypeus (yellow shiny triangle below eyes), palps (below frontoclypeus); also legs
frontal/lateral view of face. Only 1 view of face, either this view or that shown in 3 is required
clear view of wing, also shows clear view of abdomen
Print References
For Canada east of the Rockies(2)
Baier, T.M. 1999. A Revision of the Flavidus Group of the Genus Chrysops Meigen (Diptera: Tabanidae). Proceedings of the Entomological Society of Washington 101(1): 175-196.(3) (Biodiversity Heritage Library)
Brennan, J. M. 1935. The Pangoniinae of Nearctic America (Diptera: Tabanidae). The University of Kansas Science Bulletin 22(13): 249-401. (Biodiversity Heritage Library)
Philip C.E. 1955. North American Tabanidae. IX. Notes on and keys to the genus Chrysops Meigen. Rev. Brasil Ent. 3:47-128.
Neotropical key: Burger, J. F. 2002. Description of five new species of Tabanidae (Diptera) from Costa Rica and revised keys for the genera of Fidena Walker, Scione Walker, and Chrysops Meigen. Proceedings of the Entomological Society of Washington 104: 928-940. (Biodiversity Heritage Library)
Internet References
Works Cited
1.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
2.Tabanidae of Canada, east of the Rocky Mountains 1: a photographic key to the species of Chrysopsinae and Pangoniinae
Thomas A.W., Marshall S.A. 2009. Canadian Journal of Arthropod Identification No. 8.
3.A revision of the flavidus group of the genus Chrysops Meigen (Diptera : Tabanidae)
Baier, T. M. 1999. Proceedings of the Entomological Society of Washington 101: 175-196.