Revision of the Chalcid-Flies of the Tribe Chalcidini in America North of Mexico.
Washington, D. C.: Smithsonian Institution, 1940. 6 x 9 3/4". 120 pp. Library stamp on front cover. Some pages still stuck together at top. B&w illustrations. Cover scuffed , wrinkled along edges and sunned. Natural history of flies. Very Good Pamphlet (Item ID: 20438)