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Genus Epeolus

OCBees #2 - Epeolus - female Epeolus scutellaris - male Bee ID Request - Epeolus - female bee 4 - Epeolus compactus Mystery bee on Rabbitbrush - Epeolus Nomadinae, lateral - Epeolus scutellaris - female Triepeolus species? - Epeolus - female Cuckoo Bee - Epeolus bifasciatus? - Epeolus bifasciatus - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
No Taxon (Anthophila (Apoidea) - Bees)
Family Apidae (Cuckoo, Carpenter, Digger, Bumble, and Honey Bees)
Subfamily Nomadinae (Cuckoo Bees)
Tribe Epeolini
Genus Epeolus
Numbers
45 spp. in our area, >100 spp. worldwide/total(1)
Range
worldwide (map)(1)
Food
cleptoparasites of Colletes
Remarks
Differences in the shape of the pygidial plate are used for generic ID of males (shorter and broadly rounded in Epeolus; narrower and with sinuate margins in Triepeolus). This can be difficult to see even in pinned specimens so many males were described in the wrong genus, even by Cockerell and Mitchell! In females the obvious difference is the extent and configuration of a hair patch called the pseudopygidial area (shorter and more transverse in Epeolus). These hairs are often silvery. (J.S. Ascher's comment)