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Subfamily Brachycistidinae

Bethylidae? - Brachycistis Tiphiidae - Brachycistis Hymenoptera - Colocistis crassa - male 2nd Tiphiid Wasp (lateral upside-down) - Colocistis crassa - male Brachycistidinae? Male? - male Brachycistidinae? Male? - male Unknown Hymenopteran - Brachycistis - male wingless wasp - Brachycistis
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)
Superfamily Tiphioidea
Family Tiphiidae (Tiphiid Wasps)
Subfamily Brachycistidinae
Numbers
~90 spp. in 10 genera total(1)
Identification
second tergite lacks felt line (present in Mutillidae and Bradynobaenidae) [William Ericson's comment]
Range
western North America
Habitat
females are wingless and burrow in sand, only coming out to breed; males are nocturnal and come to light, sometimes by the thousands
Food
the only recoded host for the subfamily is larva of Eusattus or a closely related tenbrionid (Borowiec & Kimsey 2015)