BIBDS OF NORTH AND MIDDLE AMEEICA. 



713 



rim) of brownish black; imder parts white, each feather, except on 

 throat, anal region, and under taU-coverts, with a distinct narrow 

 mesial streak of black, confluent with narrow and irregular bars of 

 dark rusty brown, both the longitudinal and transverse raarkings 

 suffused here and there with cinnamon-rufous; throat narrowly 

 barred with russet, the chest and sides broadly barred with the same, 

 the russet bars having narrow dusky margins; under taU-coverts 

 with rather distant narrow bars of rusty brown; legs pale buffy, 

 narrowly barred in front and on outside with rusty brown or russet; 

 under wiog-coverts pale buff, the outermost (near edge of wiog) 

 irregularly barred with rusty and dusky. 



Adult Tnale.— Length (skins), 206-242 (227); wing, 162-182 (170.9); 

 tail, 78-94.5 (88.3); culmen, from cere, 12.5-15 (14.1)." 



Adult female.— Length (skins), 200-250 (228); wing, 162-183 

 (172.1); tail, 86-96 (91.2); culmen, from cere, 13.5-15.5 (14.6).* 



Costa Rica (San Jos6; La Palma de San Jose; Escazd; San Juan; 

 Reytes; Volcto de Irazl; La EstreUa de Cartago), Panamfi. (Boque- 

 r6n and Divala, ChiriquI; Chitra, Verfigua; Natd, Cocl4; Lion Hill, 

 Canal Zone; San Miguel Island, Bay of Panama), and southward over 

 greater part of South America, east of Andes, as far as Peru (Garita 

 del Sol; Rio Cadena, Cuzco; Santa Ana; upper Rio Ucayali; Cashi- 

 boya; Chamicuros; Sarayacu; Yurimaguas), Bolivia (Province of 

 Chiquitos; Moxos; Caiza), Argentina (Ocampo; C6rdova; Tucu- 

 m&n; Chaco; Pacheco; EntreRios; RioParagu&y; lower Rio Pilco- 

 mayo; Tapia), Paraguay (Sapuc&y), and Uruguay (Concepci6n). 



- Fourteen specimens. 



6 Ten specimens. 



Locality. 



Wing. 



Tail. 



Culmen 

 from 

 cere. 



MALES. 



Six adult males from Panama (mainland) 



Fire adult males from San Miguel Island, Bay of Panama 



Three adult males from Costa Bioa 



FEMALES. 



Two adult females from Paraguay 



One adult female from southeastern Brazil 



One adult female from Venezuela (Vall6) 



One adult female (7) [male 7] from Margarita Island, Venezuela 

 Three adult females from San Miguel Island, Bay of Panama. . . 

 Two adult females from Costa Rioa 



166.2 

 172.9 

 172. S 



165.7 



165 



173 



161 



180.8 



174.2 



84.7 

 90.5 

 90.5 



90.5 



89 



93.5 



86 



95.6 



88.2 



14 



14.5 



13.8 



14 



14 



15 



14.5 



15.2 



14.5 



So far as I am able to see, there is no difference in coloration between specimens 

 from Costa Rica and Panama on the one band and those from Brazil, Paraguay, etc., 

 on the other, and the species seems to be remarkably imiform throughout this vast 

 extent of territory. 



