The North American Parasitic Wasps of the Genus Tetrastichus A contribution to the Biological Control of Insect Pests.
Washington, D. C.: Smithsonian Institution, 1943. 6 x 9 3/4". 103 pp. Tops of some pages still joined. B&w illustrations. Cover sunned, with library stamp on front. Corners slightly bent. Study of Wasps. Very Good Pamphlet (Item ID: 20403)