6l6 PATAGONIAN EXPEDITIONS I ZOOLOGY. 



showed that though its crop was crowded to its utmost capacity, it con- 

 tained nothing but young grasshoppers, not a trace of other food being 

 found in its stomach." 



Genus TACHYTRIORCHIS Kaup. 



Type. 



Tachytriorchis, Kaup, Classif. Saug. u. Vog. p. 123 



(1848); Sharpe, Cat. Bds. Brit. Mus. i. p. 161 



(1874); Sharpe, Hand-Hst Bds. i. p. 254 (1899) . T. albicaudatus. 



Geographical Range. — Eastern and central Brazil from the Tropic of 



Capricorn northwards to Guiana and Colombia, along the western coast 



of Central America into the southwestern boundary of the United States. 



TACHYTRIORCHIS ALBICAUDATUS (Vicillot). 



Aqiiila coliblaiica, Azara., Apunt. I. p. 69 (1802). 



Buleo albicaitdahis, Vieill. N. Diet. d'Hist. IV. p. 477 (18 16); Pucher. 

 Rev. et Mag. Zool. 1857, p. 87; Gurney, Ibis, 1875, p. 67; id. List 

 Diurn. B. Prey, p. 69 (1884); Scl. & Huds. Argent. Orn. II. p. 61 

 (1889); Albert, Contr. Estud. Av. Chil. II. p. 519 (1901). 



Spizaetiis lenairus, Vieill. N. Diet. d'Hist. Nat. xxxii. p. 59 ( 1819 : ex Azara). 



Fako pf erodes, Temm. PI. Col. I. pis. 56, 139 (1823). 



Biiteo pterocles, Less. Man. d'Orn. I. p. 103 (1828); Scl. & Salv. Nomencl. 

 Av. Neotr. p. 119 (1873); Durnf Ibis, 1876, p. 161 (Buenos Aires); 

 Doering, Expl. al Rio Negro, Zool. p. 51 (1882: abundant in the 

 valley of the Rio Negro about Choelechoel); White, P. Z. S. 1882, 

 p. 622 (Monte Grande, April); Barrows, Auk, I. p. 109 (1884: Arroyo 

 Gualeguaychu, April). 



Btdeo albicauda, Less. Traite d'Orn. p. 81, pi. 15, fig. 2 (1831). 



Tachytriorchis pterocles, Kaup. Classif. Saug. u. Vog. p. 123 (1844); id. 

 Contr. Orn. 1850, p. 75. 



Buteo tricolor, Hartl. (nee. d'Orn.) Ind. Azara, p. i (1847). 



Biiteo leucurus, Lafr. Rev. Zool. 1849, P- 100. 



Tachytriorchis albicaudatus, Sharpe, Cat. B. Brit. Mus. I. p. 162 (1874); id. 

 Hand-list B. I. p. 254 (1899). 



Btdeo melanostethos, Phil. Vog. Chil. Arch. Naturg. 1899, p. 107 (Chili). 



Buteo pcecilogaster, Phil. torn. cit. p. 167. 



Buteo [Asturina?) cBtJdops, Phil. tom. cit. p. 168. 



Btdeo pteroc lis, Carbajal, La Patagonia, Part II. p. 256 (1900). 



