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TaxonomyBrowseInfoImagesLinksBooksData
Nearctic Wasps of the Subfamilies Pepsinae and Ceropalinae
By Henry K. Townes
Smithsonian Institute Press (Bulletin 209), 1957
Cite: 61576
This is the literature I'll be citing in my guide pages for Pepsines and Ceropalines. It obviously doesn't cover some species described after '57 but it's still the best comprehensive study. It has some really good keys. Might be hard to buy but most large university libraries should have it.

two other sources
Biostor has the pages separated into separate links. These two site have all of the pages in one PDF
Smithsonian
Biodiversity Library

Now Available Online
This reference can be read online or downloaded as a PDF at this BIOSTOR web page: http://biostor.org/reference/80332

At wrong level
This is a tricky feature--a book or link should go at the level in the guide where it is relevant. This has been placed as a resource for the genus Ageniella. Again, books and links can't be moved by users or editors--only administrator John VanDyk (or Troy, if listening), can move this.

I'm not trying to be critical--just trying to explain how this feature works.

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