During the fall and winter of 1967–68 an outbreak of sarcoptic mange (Sarcoptes scabei) occurred in Wisconsin among red foxes (Vulpes fulva) and coyotes (Canis latrans). Infected animals were usually partially hairless, listless, and emaciated. Skin lesions were characteristically thickened, dry, and crusted; the disease sometimes caused death. Mange occurred in the major fox and coyote ranges of the state and apparently affected fox population numbers.