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

Upcoming Events

2018 BugGuide Gathering in Virginia July 27-29: Registration and Discussion

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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Subgenus Empidigeron

Small Bee Fly - Geron calvus Geron from Central CA - Geron - female Small Bee Fly on Helenium bigelovii - Neacreotrichus diversus? - Geron Geron snowi? - Geron Unknown flies - Geron Mythicomyiidae - Geron Neacreotrichus?? - Geron Geron? - Geron
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Superfamily Asiloidea
Family Bombyliidae (Bee Flies)
Subfamily Toxophorinae
Genus Geron
No Taxon Subgenus Empidigeron
Explanation of Names
Empidigeron Painter 1932
6 spp., all in our area(1)
R5 approximately as long as the preceding segment of R4+5. (In subgenus Geron, R5 is two-thirds or less than the length of the preceding segment, R4+5).

The key in Painter (1932) (starting at couplet 21 on pg. 146) covers all six species listed for subgenus Empidigeron in the 2003 catalog of Evenhuis & Greathead(1). Descriptions of these six species appear on pp. 162-165 of Painter (1932).
Nearctic group, restricted to the US; G. calvus is eastern (NH-VA), the rest are in sw. US (CA to CO-NM)(1)
   aequalis: CA
   aridus: AZ, CO, NM
   calvus: MD, MA, NH, NJ, NY, PA, VA
   hybus: CA
   nudus: CO, NM
   snowi: AZ, CO, NM
Print References
Painter, R. H. (1932). A Monographic Study of the Genus Geron Meigen as It Occurs in the United States (Diptera: Bombyliidae). Trans. Amer. Entomol. Soc. 58 (2): 139-168 (1st page at JSTOR)