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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
Cite: 593990 with citation markup [cite:593990]
Full text (in 8 PDF files)

Both Volumes accessible excellent reference work!
Summarizing earlier comments below, both volumes can be read online at the "Internet Archive" website.

While Volume II is directly accessible...Volume I requires a (quick & free) account sign-up, and a (quick & free) "online book check-out" process.

    Volume I (Introduction, Colletidae, Andrenidae, Halictidae, and Melittidae):

    Volume II (Megachilidae, Anthophoridae, Xylocopidae, and Apidae):

The formal coverage area is the entire region east of the Mississippi River.

For those interested in the backstory of this work, and its author, I recommend the 2016 paper in The American Entomologist entitled: "T. B. Mitchell: The Man Behind The Bees of the Eastern United States" (PDF available here).

A small excerpt from that paper:

"Much of Mitchell’s taxonomic work is still valid, and his two-volume opus, The Bees of the Eastern United States, published in 1960 and 1962, remains an important reference for bee biologists. “I use them still, if I get a bunch of unidentified Andrena or some other genus,” said renowned melittologist Charles Michener of the University of Kansas."
This work is indeed a "classic" of bee taxonomy.

Volume 1 is also freely acces
Volume 1 is also freely accessible on Hathitrust:

Updated and Alternate links
The link =v= provided above wasn't working when I tried it and appears to be broken.

I found an alternate URL which I'm guessing corresponds to the same web page the old URL above originally linked to above:

The Internet Archive link below is another alternative, but it only provides Vol II (covering Megachilidae, Anthophoridae, Xylocopidae, and Apidae):

Additional alternate link
Volume I (containing Colletidae, Andrenidae, Halictidae, and Melittidae) is also now available at Internet Archive:

Many thanks, good to have both volumes available. I've often seen this work referenced in the "bee literature"...guess it's a "classic", with lots of valuable info, figures, insights, etc. Wish there were a similar work for bees of the western US!

I'm a bit puzzled as to why the Vol II link is directly viewable on the "Internet Archive" website, whereas the Vol I link requires creating an account (which is free) on the website, and going through a library-like "book check out". But that's not so hard to do, and it's wonderful to have both volumes freely available to the public :-)

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