BIRDS OF NORTH AND MIDDLE AMERICA 269 



certainty from that of the hght phase of Buteo jamaicensis calurus. 

 Juvenals often have the middle of the crown and sides of breast cream 

 to warm buff, but this fades, leaving these feathers white shortly after 

 the birds have left the nest. 



Natal down.—Fale smoke gray, a little whiter on the underparts. 



Adult male.—Wing 365-390 (380.8); tail 203-224 (211.2); culmen 

 from cere 21.5-26 (24.2); tarsus 66-95 (80.9); middle toe without 

 claw 39-44 (41.0 mm.).^^ 



Adult female.—Wing 390-430 (409.1); tail 207.5-238 (226.2); 

 culmen from cere 24.5-28 (26.4); tarsus 74-100 (86.8); middle toe 

 without claw 43-48.5 (44.9 mm.).^^ 



Range.— Breeds from extreme northern British Columbia east of 

 the coast ranges (Atlin region; Blue Canyon; Wilson Creek); north 

 into the valley of the Yukon (Forty Mile) and to the Mount Logan 

 area, Alaska (Chitina glacier); eastward and southeastward to the 

 Red Deer region. Alberta, and to north central North Dakota (Rolla). 



Winters in Arkansas and adjacent areas south to Louisiana (Baton 

 Rouge; St. Francisville, etc.) and Texas (Gainesville; San Antonio, 

 Medina River; Fort Brown (?)); migrating from its breeding grounds 

 east of the mountains through Manitoba, the Dakotas, Minnesota, 

 Nebraska, Iowa, Missouri, and Kansas, occasional specimens Hnger- 

 ing en route. Occasional in Colorado (Colorado Springs; Fort Lyon) 

 and Illinois (Warsaw; Calumet River; Toledo); Indiana, casual in 

 Pennsylvania (Northumberland County); Georgia (sight records 

 only) ; and California (Santa Clara) ; doubtfully recorded from Arizona 

 (Gila River). Recorded (unsatifactorily) from Veracruz and from 

 Oaxaca, Mexico. 



The majority of winter specimens in collections are from Ai'kansas, 

 which seems to be the center of the winter distribution; more migrants 

 have been collected in North Dakota than any other one area. 



Type locality. — St. Francisville, La. 



Falco harlani Audubon, Birds Amer., fol. ed., 1830, pi. 86; Orn. Biogr., i, 1831, 

 441 (St. Francisville, La.; type now in coll. Brit. Mus.; see Salvin, Ibis, 

 1874, 314); V, 1839, 380).— Nuttall, Man. Orn. United States and Canada, 

 Land Birds, 1832, 105. 



Buteo harlini Audubon, Synopsis, 1838, 6 (Louisiana). 



Buteo harlani Bonaparte, Geogr. and Comp. List, 1838, 3. — Audubon, Birds 

 Amer., 8vo ed., i, 1840, pi. 8.— Cassin, lUustr. Birds California, Texas, etc., 

 1854, 101; in Baird, Rep. Pacific R. R. Surv., ix, 1858, 24, part (near Fort 

 Thorne, N. Mex.; description of adult [but not of young which = B. j. calu- 

 rus]).— Strickland, Orn. Syn., i, 1855, 30.— Baird, Cat. North Amer. 



" Thirty specimens from Arkansas, North Dakota, Kansas, Texas, and Mani- 

 toba. 



3« Thirty-one specimens from Arkansas, Kansas, North Dakota, Manitoba, 

 Alberta, and Alaska. 



