A Revision of the puer Group of the North American Genus Melanaplus, with Remarks on the Taxonomic Value of the Concealed Male Genitalia in the Cyrtacanthacrinae. (Orthoptera, Acridae).
Ann Arbor, MI: The University of Michigan, 1932. 8vo. 62 pp. Spine ends and corners are very lightly bumped, museum stamp to top right corner of cover . Otherwise book is in excellent condition. University of Michigan Museum of Zoology, Miscellaneous Publications No.23. Very Good Paperback (Item ID: 70453)