Orthoptera of Michigan
PDF file, full title: The Orthoptera of Michigan — Biology, Keys, and Descriptions of Grasshoppers, Katydids, and Crickets.
I only see the Acrididae in that link--needs investigation. Color photos of each genus in that volume. Apparently the PDF is only part of the whole publication--too bad.
There is supposed to be a print version, quoting from the web site:
The Orthoptera of Michigan, Biology, keys, and descriptions of grasshoppers, katydids and crickets by Roger Bland. MSU Extension Bulletin E-2815, 220 pp. ISBN - 1-56525-017-6. ordering information is online at: