the most recent classification is closer to the refined scheme; there are now seven families in addition to the Sphecidae and Crabronidae, all of which were formerly placed within Sphecidae. Family Crabronidae All the other digger wasp taxa that were formerly included in Sphecidae (sensu lato) were placed in the family Crabronidae, which was itself paraphyletic, and recent classifications have split Crabronidae into a number of smaller families, mostly formerly treated as subfamilies. References Sources Goulet, H., Huber, J.T. (1993) Hymenoptera of the World. Agriculture Canada Research Branch, publication 1894/E. 668pp. External links Catalog of Sphecidae sensu lato at Cal Academy Online Identification Guide to Eastern North American Sphecidae Biology of Australian Sphecidae Image Gallery Apocrita families Cosmopolitan arthropods