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Subfamily Brachycistidinae

Thread-waisted Wasp ? - Brachycistis Bethylidae? Braconid Wasp (Braconidae), Lizard Wash, Anza-Borrego Desert State Park, CA, 3-14-15 Bethylidae? - Brachycistis - female Tiphiid Wasp? - Colocistis crassa - male Tiphiid Wasp with Primary Submarginal Isolation (ventral abdomen) - Colocistis crassa - male Wasp - Brachycistis - male Mojave-6 - Brachycistis - 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)
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)