648 



PATAGONIAN EXPEDITIONS I ZOOLOGY. 



nating power on the vision, so surpassingly bright was it by constrast in 

 the midst of that universal unrelieved greyness." 



BUTEO SWAINSONI, Bonaparte. 



Buteo swainsoni, Bonap., Geogr. and Comp. List, p. 3 (1838); Scl. & 

 Salv. Nomencl. Av. Neotr. p. 119 (1873); Gurney, Ibis, 1876, p. 234, 

 id. List Diurn. B. Prey, p. 68 (1884); Scl. & Huds. Argent. Orn. II. p. 

 59, pi. xvi (1889); Sharpe, Hand-list B. I. p. 256 (1899). 



FIG. 329. 



Buteo swainsoni. Adult male. About one-fourth natural size. From a bird 



in the American Museum. 



Buteo obsoletus, Sharpe, Cat. B. Brit. Mus. I. p. 184 (1874: Patagonia); 

 Burm. An. Mus. Nac. Buenos Aires, III, part X, p. 241 (1888: Pat- 

 agonia); Martens, Hamb. Magalh. Sammelr. p. 6 (1900: Patagonia); 

 Albert, Contr. Estud. Av. Chil. II. p. 516 (1901). 



Buteo pictus, Phil. Voy. Chil. Arch. Naturg. 1899, p. 169. 



Buteo macronychiis, Phil. torn. cit. p. 168. 



