Near fine copy in original wrappers, pages cut to facilitate ease of use. A Descriptive Catalog of the Higher Groups, Genera, Species, and Subspecies of Birds Known to Occur in North America, from the Arctic Lands to the Isthmus of Panama the West Indies and other Islands of the Caribbean Sea, and the Galapagos Archipelago.United States National Museum: Bulletin 50, 793 pp. The concluding volume of a work began by Robert Ridgway in 1901. Treats the Falconiformes: The American Vultures, Hawks, Eagles, Kites, Harriers, Osprey, Falcons and Caracaras. Other volumes in the series may be purchased from Buteo Books