Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
compiled by
Wojciech J. Pulawski
California Academy of Sciences, Golden Gate Park, San Francisco, CA

Site with extensive taxonomic information. Is also included under Internet references in the guide page for Sphecidae, but it is worthy of its own link as well.
[cite:98203]

Link updated 17 January 2016 as per comments.
Title updated 1/30/24.
https://www.calacademy.org/scientists/projects/catalog-of-sphecidae

Link

This is an incredible resource
Highly recommended!

link broken?
doesn't work for me

 
updated...
I updated the link to what the old link was giving me as a redirect. It does work, but there are some server error messages.

[cite:98203]
pls edit so the Title reads, "Pulawski W.J. (2003-) Catalog of Sphecidae sensu lato (Apoidea excluding Apidae)"; thanks again!
temporary location of the resource as of 5.xi.2014

 
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title updated
I updated that title. I've never liked these convoluted titles, but I see why people want them, I guess. If I quote a cited source on a guide page, or whatever, I go ahead and write out the reference followed by a "cite" tag. However usage seems to have gone towards longer titles in the name, so I'll go with it henceforth.