Description: Papers of Clell L. Metcalf (1888-1948), professor of entomology (1921-47), including biographical information, publications, correspondence, lectures, and photographs concerning the Chicago World's Fair, World War II, a New York State Museum-sponsored study of black flies and punkies in the Adirondack Mountains, pesticides such as dicholoro diphenyl trichloro ethane (DDT), parasites, insects, and their effects on humans and the environment.