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Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

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Catalog of Hymenoptera in America North of Mexico
By Karl V. Krombein, Paul D. Hurd, Jr., David R. Smith, and B. D. Burks
Smithsonian Institution Press, 1979
Cite: 242722
Available online at Internet Archive:
Volume 1
Volume 2
Volume 3 (index)

FYI: An alternate link to Krombein's useful catalog
I find the the "Biodiversity Heritage Library" links & interface for the catalog easier to work with than those of the "Internet Achive" particular for providing clean reference links to pages of interest when writing up remarks or comments for BugGuide (though perhaps it's a "6 of one, half-a-dozen of the other" kinda thing).

Links to the BHL pages appear below:

  Volume 1: Symphyta and Apocrita (Parasitica)
  Volume 2: Apocrita (Aculeata)
  Volume 3: Indices

Though it's nearly 40 years old now, I've found this magnificent tome by Krombein & Co. (AKA "The Red Book") to be extremely useful in getting a feel for terms of its organization, and the vast numbers of taxa at various levels. And also, importantly, for ferreting out more specific and detailed reference papers in the literature!!

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