Author: Ashmead, W. H.
Title: Monograph of the North American Proctotrypidae.
Description: Washington, Bull. U.S. Nat. Mus., 1893. 8vo. 472p., 18 plates. New cloth with original wrappers bound in. = Extensive, interesting monograph. Library stamp to inner board and a blindstamp to titlepage, condition otherwise good.

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