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Books
Data

Anthophila (Apoidea) - Bees

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A revision of Perdita (Xerophasma) Timberlake (Hymenoptera: Andrenidae)
By T. Griswold, W. Miller
Zootaxa 2517: 1–14, 2010

Studies of Halictinae (Apoidea: Halictidae) I: Revision of New World Lasioglossum Curtis
By Ronald J. McGinley
Smithsonian Institution, 1986
A revision of 51 species of New World Lasioglossum sensu stricto, including species south of the United States.

304 page (141 MB) PDF online at http://www.sil.si.edu/smithsoniancontributions/zoology/pdf_hi/SCTZ-0429.pdf

A review of the cleptoparasitic bee genus Townsendiella (Apidae, Nomadinae, Townsendiellini)...
By Orr M.C., Griswold T.L.
ZooKeys 546: 87-104, 2015
Full title: A review of the cleptoparasitic bee genus Townsendiella (Apidae, Nomadinae, Townsendiellini), with the description of a new species from Pinnacles National Park
Full text

A revision of the dufoureine genus Micralictoides Timberlake (Hymenoptera: Halictidae)
By Bohart, G.E., and T.L. Griswold
Pan-Pacific Entomologist 63: 178-193, 1987

Bees of northwestern America: Halictus (Hymenoptera: Halictidae)
By R.B. Roberts
Oregon State U. Agric. Experiment Station, Technical bulletin 126: 1-23, 1973

Wool carder bees of the genus Anthidium in the Western Hemisphere (Hymenoptera: Megachilidae): diversity, host plant associa...
By Victor H. Gonzalez , Terry L. Griswold
Zoological Journal of the Linnean Society, Vol. 168(2), pp. 221–425, 2013
This is an outstanding reference covering New World members of the genus Anthidium.

The full title is:

"Wool carder bees of the genus Anthidium in the Western Hemisphere (Hymenoptera: Megachilidae): diversity, host plant associations, phylogeny, and biogeography"
The 200+ page revision can be:

1) Freely viewed online at the URL:   https://academic.oup.com/zoolinnean/article/168/2/221/2433440/Wool-carder-bees-of-the-genus-Anthidium-in-the  

Leafcutter and Mason Bees of the Genus Megachile Latreille (Hymenoptera: Megachilidae) in Canada and Alaska
By Sheffield, Cory S. et al.
Canadian Journal of Arthropod Identification, 2011
"Our objective is to provide an up-to-date revision of the genus Megachile of this region, including an interactive key to the species, and summaries of biogeographic distribution and life history."

HTML version online

A Revision of the Genus Ashmeadiella (Hymen., Megachilidae)
By Michener, Charles D.
The American Midland Naturalist. 22(1): 1-84, 1939
Available online at JStor

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