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Subgenus Sayapis

 
 
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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

Phylogeny of the bee family Megachilidae (Hymenoptera: Apoidea) based on adult morphology
By Gonzalez V.H., Griswold T.L., Praz C.J., Danforth B.N.
Syst. Entomol. 37: 261-286, 2012

The Bees in Your Backyard: A Guide to North America's Bees.
By Joseph S. Wilson & Olivia J. Messinger Carril
Princeton University Press, 2015
A wonderfully written, richly and attractively illustrated book, mostly with the authors' own excellent images!
This is a wonderful introduction to North America's over 4000 native bee species. The title page's photos communicate at once the great diversity of our bee fauna.
A MUST for everyone who wants to learn about the bees that have evolved with our flora, as well as a useful reference for professionals.

Field Guide to the Common Bees of California
By Gretchen LeBuhn & Noel B. Pugh
University of California Press, 2013
Text by Gretchen LeBuhn, illustrations by Noel B. Pugh.

A useful guide for learning about the common California bee taxa.

174 pp. (including index).

California Bees & Blooms: A Guide for Gardeners and Naturalists
By Gordon G. Frankie, Robbin W. Thorp, Rollin E. Coville, Barbara Ertter
Heyday (in collaboration with the California Native Plant Society), Berkeley, California, 2014
Info on this book, its focus, and its authors, can be found at this Univ. of Calif. Extension link.

The book, including index, is 294 pages. The initial 8 chapters (126 pp.) focus on ecology, natural history, and family-by-family profiles of California bee taxa. Chapter 9 (pp. 127-144) addresses flowers and their relationship to bees. The remainder of the book focuses how to make home and other gardens more bee friendly to promote healthy and diverse urban/suburban bee populations. There are many fine photos.

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A taxonomic key to mature larvae of cleptoparasitic bees (Hymenoptera: Apoidea)
By Rozen J.G., Jr.
Am. Mus. Novitates 309: 1-27, 2001

Principal sunflower bees of North America with emphasis on the southwestern United States
By Hurd P.D., LaBerge W.E., Linsley E.G.
Smiths. Contr. Zool. 310, 1980
Full text (87MB)

Bees of the eastern United States
By Mitchell T.B.
Tech. Bull. (NC Agric. Exp. Sta.): No. 141 (538 pp.), 1960; and No. 152 (557 pp.), 1962
Full text (in 8 PDF files)

 
 
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