An edition of How to know the grasshopper, cockroaches and their allies (1953)

How to know the grasshoppers, cockcroaches [sic] and their allies

pictured-keys for identifying many of the grasshoppers, crickets, Katydids, earwigs, termites, cockroaches, praying mantids, rock-crawlers, and walkingsticks occuring in North America, north of Mexico.

By Jacques R. Helfer