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Genus Triepeolus

Cuckoo Bee -- Triepeolus donatus?  - Triepeolus donatus - male Cuckoo Bee - Triepeolus Nomadinae? - Triepeolus verbesinae wasp - Triepeolus concavus - male Triepeolus grandis? - Triepeolus grandis - male Triepeolus - male Triepeolus? - Triepeolus concavus - male 9037581 Triepeolus - Triepeolus
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 (Apoidea (clade Anthophila) - Bees)
Family Apidae (Cuckoo, Carpenter, Digger, Bumble, and Honey Bees)
Subfamily Nomadinae (Cuckoo Bees)
Tribe Epeolini
Genus Triepeolus
Synonyms and other taxonomic changes
Includes Doeringiella sensu Michener (2000)
reviewed (partly) in (1)
Numbers
108 spp. in our area, 147 spp. worldwide/total(2)
Range
holarctic + neotropical (map)(2)
Food
parasitic on Melissodes and possibly some of the other related eucerines
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 appressed and silvery or golden.
Internet References