The Type Species of the Genera and Subgenera of Bees.
Washington, D. C.: Smithsonian Institution, 1943. 6 x 9 3/4". 100 pp. Library stamp on cover. Some pages still stuck together at top. B&w illustrations. Cover sunned, slightly soiled, somewhat wrinkled near binding. Natural history of bees. Very Good Pamphlet (Item ID: 20431)