38 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



less at posterior extremity) black; bill black; iris brown; legs and 

 feet horn color (in dried skins); length (skins), 109.2-137.2 (124.2); 

 wing, 69.6-80 (74.7); tail, 44.7-53.1 (49.3); exposed culmen, 9.4-10.7 

 (9.9); depth of bill at base, 5.1-5.6 (5.3); tarsus, 17-19.1 (17.8); middle 

 toe, 11.4-12.7 (12.2).' 



Adult female.— SimilsLT in color to the adult male and not always 

 distinguishable, but usually more or less duller in color; length (skins), 

 127-132.1(129.5); wing, 70. 1-78. 2 (72. 6); tail, 43. 9-53. 1(47.2); exposed 

 culmen, 9.9-10.2 (10); depth of bill at base, 5.1-6.8 (5.3); tarsus, 

 17.3-18 (17.8); middle toe, 11.9-12.2.' 



Young inale. — Much duller in coloration than the dullest adult 

 females; above olive-green, slightly tinged with yellow on sides of 

 head, more decidedly yellowish on rump; feathers of pileum with 

 small triangular or sagittate central spots of blackish, the interscapulars 

 and scapulars with large dusky markings of similar position and shape; 

 wings and tail blackish with yellowish green edgings; malar region, 

 chin, and throat dull greenish buffy; rest of under parts buffy yellow 

 (naples or maize), medially more yellowish, more olive-greenish 

 laterally. 



Young female. — Similar to the young male but still duller in color. 

 .Costa Rica (San J os6; Dota; Turrialba; Barranca; Candelaria Mts. ; 

 Naranjo; Orosi; Cartago; San Marco, etc.), southward through Colom- 

 bia to Ecuador (Pun ta Playa, near Quito; Nanegal; Pasto; Napo; Bois 

 de Bagnos; Tongaragua, etc.). 



Calliste icterocephala Bonapakte, Compt. Rend., xxxii, 1851, 76 (Punta Playa, 

 near Quito, Ecuador). — Sclatek, Jardine's Contr. Om., 1851, 53, pi. 70, fig. 

 1; Proc. Zool. Soc. Lond., 1856, 19, 251 (monogr.; Punta Playa, Ecuador); 

 1860, 87 (Nanegal, w. Ecuador) ; Synop. Av. Tanagr., 1856, 77; Monogr. Cal- 

 liste, 1857, 37, pi. 17 (Quito, Ecuador); Oat. Am. Birds, 1862, 65 (Nanegal); 

 Cat. Birds Brit. Mus., xi, 1886, 110 (Nanegal, Pasto, and Napo, Ecuador; 

 Frontino, Colombia; Volcan de Chiriqui; Santa F^, Calovevora, and Cor- 

 dillera de Tol6, Veragua; San Jos^, Dota, Turrialba, and Barranca, Costa 

 Rica) .— Salvin, Proc. Zool. Soc. Lond., 1867, 138 (Cordillera de Tol6 and 

 Santa F6, Veragua; crit.); 1870, 186 (Volcan de Chiriquf; Boquete de 

 Chitra, Cordillera del Chuca, and Calovevora, Veragua). — Lawrence, Ann. 



^ Seven specimens. 



^Four specimens from Costa Rica. 



Costa Rican and Ecuadorean males compare in average measurements as follows: 



I am not able to detect any color differences, and the determination of sex being 

 in some cases open to question, the apparent- difference in size may prove inconstant. 



