652 PATAGONIAN EXPEDITIONS I ZOOLOGY. 



with blackish on a buffy white ground and the lower tail-coverts buffy, 

 with narrow cross bars of dusky. 



Geographical Range. Western North America, more common west of 

 the Mississippi, and ranging north into Alaska and the region west of 

 Hudson Bay ; south through Middle and South America ; on the eastern 

 side as far south as northern Patagonia. 



FIG. 333. 



Buteo swainsoni. Immature male. About one-fifth natural size. From a bird 



in the American Museum. 



This does not appear to be a common bird in the Patagonian region 

 and the records of it are but few, and these from the more northern parts 

 of the province. The species was not noticed by the Princeton naturalists 

 and the descriptions here given are based on birds in the University 

 Museum from Western North America, and from a large series in the 

 American Museum. 



Genus HARPYHALIAETUS Lafresnaye. 



Type. 



Harpy haliaetus, Lafr. Rev. Zool. 1842, 



p. 173; Sharpe, Cat. Bds. Brit. 



Mus. i. p. 221 (1874); Sharpe, 



Hand-List Bds. i. p. 259 (1899) H. coronatus. 



Urubitornis, Verr. P. Z. S. 1856, p. 



145 . . . H. coronatus var. (?)=//. solitarius. 



