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Subfamily Philanthinae

Cerceris? - Cerceris bicornuta - male Wasp on rattlesnake master inflorescence - Cerceris bicornuta - female unknown small Hymenoptera - Cerceris Cerceris maybe, part 2 - Philanthus Cerceris californica  - Cerceris californica - female Black and yellow mason wasp (2) - Cerceris Waspv551A 1421 & 1422 & 1423 - Philanthus ventilabris Crabronid wasp beewolf? - Philanthus sanbornii - female
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 (Apoid Wasps (Apoidea)- traditional Sphecidae)
Family Crabronidae
Subfamily Philanthinae
Numbers
155 spp. in 6 genera of 3 tribes in our area (of which ~90 Cerceris spp.)(1), 1143 spp. in 9 genera of 4 tribes worldwide (of which 870 Cerceris spp.)(2)
Size
body 12-18 mm
Identification
Digger wasps of medium size, usually black with yellow markings. They have a constriction between the first and second abdominal segments. One apical spur on middle tibia. Forewing with 3 submarginal cells.
Food
nests provisioned with bees (in the Philanthini), ants (Aphilanthopini), or beetles (Cercerini)