A monograph of the North American Proctotrypidæ
By: by William H. Ashmead.
Contributors: United States National Museum.
Series: Bulletin of the United States National Museum -- no. 45; Bulletin (United States National Museum) -- no. 45.
Publisher: G.P.O.
Published: 1893
Place of publication: Washington
Language: eng
Number of pages: 472
Subjects: Proctotrupidae.; Hymenoptera -- North American.
Notes: Includes bibliographical references and index.