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Subfamily Crabroninae - Square-headed Wasps

Wasp, leaving burrow - Crabro - female 6007223 wasp - Trypoxylon Tiny Sphecid - Tachysphex - female Liris Wasp - Ectemnius maculosus - male Wasp - Trypoxylon mole cricket hunter - Larra bicolor - female Tiny Wasp with prey
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Bees, Ants, and other Stinging Wasps)
No Taxon (Apoid Wasps (Apoidea)- traditional Sphecidae)
Family Crabronidae
Subfamily Crabroninae (Square-headed Wasps)
Synonyms and other taxonomic changes
formerly placed in family Sphecidae; transferred to Crabronidae by Prentice (1998) and Melo (1999) - see PDF doc by Pulawski in Internet References section below
Numbers
4,568 species in the world
4,623 species according to California Academy
Size
body length 6-20 mm
Identification
Large and quadrate head, with the inner margins of the eyes straight and converging ventrally. Forewing has only one submarginal cell.
Habitat
Adults commonly found on flowers.
Remarks
Some nest in hollow stems or in abandoned galleries in wood, others burrow in the ground. The principal prey is flies, but some utilize various other types of insects.
Print References
(1)
Internet References
classification; PDF doc of superfamily Apoidea (Wojciech Pulawski, 2006, California Academy of Sciences)
number of species worldwide (California Academy of Sciences)
life history and larval description; PDF doc of Podagritus parrotti in New Zealand (A.C. Harris, Journal of the Royal Society of New Zealand)
Works Cited
1.Borror and DeLong's Introduction to the Study of Insects
By Norman F. Johnson, Charles A. Triplehorn