The nearctic parasitic wasps of the genera Psilus Panzer and Coptera Say
Subtitle: (Hymenoptera, Proctotrupoidea, Diapriidae)
By: by Carl F.W. Muesebeck ; prepared by Science and Education Administration.
Contributors: United States. Science and Education Administration.
Series: Technical bulletin - Dept. of Agriculture ; no. 1617; Technical bulletin (United States. Dept. of Agriculture) -- no. 1617.
Publisher: Dept. of Agriculture, Science and Education Administration
Published: 1980
Place of publication: [Washington]
Language: eng
Number of pages: 71
Subjects: Hymenoptera -- United States.; Wasps -- United States.
Notes: Includes index.

Issued July 1980.

Bibliography: p. 52-53.