Genus Conocephalus - Lesser Meadow Katydids

This key can be used to identify tree crickets found in the U.S.

Identification notes and general information about grasshoppers of the Canadian Prairies and the Northern Great Plains.

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:

From the home page:

"The Orthoptera Species File (OSF) is a taxonomic database of the world's orthopteroid insects. It contains full synonymic and taxonomic information for over 25,000 species and genera (all taxa described prior to 1998) of the Tettigonioidea (katydids and haglids),Grylloidea (crickets), Acridomorpha (locusts and grasshoppers: Acridoidea + Eumastacoidea + Trigonopterygoidea + Pneumoroidea + Pamphagoidea), Tetrigoidea (pygmy grasshoppers), and Tridactyloidea (sand crickets), as well as images and sounds for many species. A database for the Gryllacridoidea will become available in the second half of 1999. This site also includes a searchable database of entomologists working on the Orthoptera."