Blank et al. (2012) ECatSym: Electronic World Catalog of Symphyta (Insecta, Hymenoptera). Program version 4.0 beta
Taxonomic data base (with distribution info provided for every taxon included) maintained by people at the Senckenberg Deutsches Entomologisches Institut, Müncheberg, Germany, and adopted as BG's default taxonomy reference
. See also discussion here
"...the best thing to check for current usage of names" (Dr. Smith's comment
authors: Blank S.M., Groll E.K., Liston A.D., Prous M., Taeger A.
i still haven't figured out how to use it...