36 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



narrowly tipped with white, the remaining lateral rectrices black 

 broadly tipped with white; lores blackish slate, deepening into dull 

 slate-black around eye3 and on auricular region; malar region, lower 

 portion of suborbital region, and sides of neck pale gray, usually 

 tinged with buffy; under parts plain buff, usually deepest on thighs; 

 under wing-coverts light buff, the inner webs of remiges passing into 

 light buff on edges (except distally); bill wholly black; iris dark 

 brown; legs and feet dusky (pale bluish gray in life?). 



Young. — Similar to adults but lateral rectrices dull grayish black 

 with terminal areas brownish white and not sharply defined, and 

 middle pair of rectrices not blackish terminally. 



Adult male— Length (skins), 242-278 (260); wing, 110.5-120.5 

 (115.3); tail, 128-144 (134.6); exposed culmen, 22.5-26 (24.4); tarsus, 

 26-28.5 (26.8), outer anterior toe, 17-19.5 (17.9). 5 



Adult female.— Length (skins), 240-287 (262); wing, 112.5-124.5 

 (118.1); tail, 128-150.5 (139.6); exposed culmen, 22.5-26.5 (24.2); 

 tarsus, 25-28.5 (26.8); outer anterior toe, 17-20 (18.1).° 



Colombia (Cali, Guabinas, Palmira, Cauca Valley, Cauca at 3,500 

 feet, and Kio Lima, Cauca; Bonda, Santa Marta; Rio Barratoro; Los 

 Tambos; Jime'nez; Atuncelo; Caldas; Gorgona Island), Venezuela 

 (Caracas; La Guaira; La Brea; Quiribana de Caicara; Culata), Trini- 

 dad, British Guiana (Annai; Bartica Grove; Demerara River; Yuru- 

 ani River), Surinam, Cayenne, and southward to Paraguay (Lambarfi; 

 Sapucay), Uruguay (Concepcion), Argentina (Buenos Aires, Con- 

 chitas, and Barracas al Sud, Buenos Aires; Lomas de Zamora; Tapia; 

 Punta Lara; Belgrano; Estancia Espartilla; lower Rio Pilcomayo; 



a The mandible possibly grayish, basally in life. 

 6 Fifteen specimens. 

 « Twenty specimens. 



Locality. 



Wing. 



Taa. 



Ex- 

 posed 

 culmen. 



Tarsus. 



Outer 



anterior 



toe. 



MALES. 



Four adult males from Colombia 



Two adult males from Venezuela 



One adult male from Argentina 



One adult male from Uruguay 



Five adult males from Galapagos Islands 



FEMALES. 



Ten adult females from Colombia 



One adult female from Gorgona I., Colombia 



One adult female from Venezuela 



Two adult females from British Guiana 



Two adult females from Bolivia 



Two adult females from Argentina 



Two adult females from Uruguay 



114.7 



117.5 



115 



111.5 



115.7 



117.7 



117 



116 



121.2 



119.7 



114 



120.7 



136 



137.2 



136.5 



128 



134.2 



138.7 



135 



134 



148 



141.5 



141.7 



137.2 



24.4 



25 



24.5 



24.5 



24.6 



24.8 



22.5 



24 



23.2 



24 



24.2 



27 



27.2 



27 



26.5 



26.9 



26.9 



25.5 



25 



26.7 



26.7 



26.5 



28.2 



18.1 



17.2 



17 



18.5 



17.7 



18.5 



17 



18 



17.2 



17.7 



18 



18.2 



