ORDER RAPTORES. 159 
Buteo abbrevidtus CABaNis. Zone-tailed Hawk. [340.] 
Buteo abbreviatus CABANIS, in SCHOMBURGK, Reisen Brit. Guiana, ITI, 
1848, 739. (Upper Pomeroon, British Guiana.) 
Rance.— Lower Sonoran Zone in Arizona, New Mexico, and south- 
western Texas south through Mexico and Central America to Vene- 
zuela and British Guiana; casual in southern California. 
Buteo swainsoni BoNAPaRTE. Swainson’s Hawk. [342.] 
Buteo swainsoni BONAPARTE, Geog. & Comp. List, 1838, 3. (Near the 
Columbia River.) 
RanGcE.— North and South America. Breeds from southern Brit- 
ish Columbia, Fort Yukon, Alaska, northwestern Mackenzie, and 
Manitoba south to Chile; casual in Quebec, Ontario, Maine, and 
Massachusetts; winters from South Dakota southward. 
Buteo platypterus (VIEILLOT). Broad-winged Hawk. ([343.] 
Sparvius platypterus Vir1tLot, Tableaux Encycl. Méth., III, 1823, 1273. 
(Schuylkill River, near Philadelphia, Pa.) 
RanGe.— Eastern North America. Breeds from central Alberta, 
southeastern Saskatchewan, northern Ontario, New Brunswick, and 
Cape Breton Island south to the Gulf coast and central Texas, mainly 
east of the Mississippi; winters from the Ohio and Delaware valleys 
south to Venezuela and Peru. 
Suscenus TACHYTRIORCHIS Kavp. 
Tachytriorchis Kaup, Class. Siug. und Vdégel, 1844, 123. Type, by 
monotypy, Falco pterocles TpEMMINCK = Buteo albicaudatus V1EILLOT. 
Buteo albicaudatus VIEILLOT. 
RancEe.— Texas south through Mexico, Central America, and 
South America to Chile and Argentina. 
a. [Buteo albicaudatus albicaudatus. [Extralimital.] 
b. Buteo albicaudatus sénnetti ALLEN. Sennett’s White-tailed Hawk. ([341.] 
Buteo albicaudatus sennetti ALLEN, Bull. Am. Mus. N. H., V, July 19, 
1893, 144. (Lower Rio Grande Valley, Texas.) 
