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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


Species Copestylum mexicanum - Mexican Cactus Fly

big black fly, side view - Copestylum mexicanum Copestylum mexicana? - Copestylum mexicanum - female Blue Black Fly unknown - Copestylum mexicanum - male giant fly - Copestylum mexicanum - male black fly on baccharis - Copestylum mexicanum Black fly with distinctive patterned wings - Copestylum mexicanum Bee Fly...  Hover Fly...? - Copestylum mexicanum Copestylum - Copestylum mexicanum
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Aschiza")
Family Syrphidae (Hover Flies)
Subfamily Eristalinae
Tribe Volucellini
Genus Copestylum
No Taxon (mexicanum-violaceum group)
Species mexicanum (Mexican Cactus Fly)
Other Common Names
Mexican Flower Fly
Synonyms and other taxonomic changes
Volucella mexicana, V. nigra
Explanation of Names
Copestylum mexicanum (Macquart 1842)
Alula entirely covered with microtrichae.
so. US (GA-FL-CA) & Mexico(1)
Larvae feed on rotting cactus
Internet References
Curran, C. H. (1953). Notes and descriptions of some Mydaidae and Syrphidae (Diptera). American Museum Novitates Vol. 1645: 1-15. (AMNH Digital Repository)