ORDER RAPTORES. a Er 
Parabiteo unicinctus (TEMMINCK). 
Southern United States south to Argentina. 
RANGE. 
a. [Parabuteo unicinctus unicinctus. Extralimital.] 
b. Parabuteo unicinctus harrisi (AupUBON). Harris’s Hawk. [835.] 
Buteo harrist AUDUBON, Birds Amer. (folio), IV, 1837, pl. 392. (Between 
Bayou Sara and Natchez, Mississippi.) 
RANGE.— Lower Sonoran Zone in southeastern California, southern Ari- 
zona, southern New Mexico, southern Texas, Louisiana, and Mississippi south 
to Cape San Lucas and Panama; accidental in Iowa. 
GENUS BUTEO LackpEDE. 
Buteo LackrrpE, Tableaux Ois., 1799, 4. Type, by tautonymy, Falco 
buteo Linnaus. 
Suspcenvus BUTEO. 
Biteo borealis (GMELIN). 
Rance.— North America from southeastern Alaska and central 
Canada south to Guatemala. 
a. Buteo borealis borealis (GMELIN). Red-tailed Hawk. [337.] 
Falco borealis GMELIN, Syst. Nat., I, i, 1788, 266. (Carolina.) 
RanceE.— Eastern North America, from Saskatchewan, Wisconsin, and 
Illinois east to central Keewatin and Newfoundland, and south to eastern 
Texas, northeastern Mexico, the Gulf coast, Florida, and the Greater Antilles. 
b. Buteo borealis krideri Hoopes. Krider’s Hawk. ([337a.] 
Buteo borealis var. kriderii Hooprs, Proc. Acad. Nat. Sci. Phila., 1873, 
238, pl. 5. (Winnebago Co., Iowa.) 
RanGcE.— Great Plains from Wyoming, North Dakota, and Minnesota 
south to Nebraska and Missouri and in winter to Wisconsin, Illinois, Texas, 
Louisiana, and Mississippi. 
c. Buteo borealis calirus Cassin. Western Red-tail. [337b.] 
Buteo calurus Cassin, Proc. Acad. Nat. Sci. Phila., VII, 1855, 281. (Near 
Fort Webster, Rio Mimbres, New Mexico.) 
