BIEDS OF NORTH AKD MIDDLE AMERICA. 683 



malar regions uniform black, forming a conspicuous "mask," this 

 everywhere sharply defined except on crown, where the posterior 

 margin is more or less broken; rest of upper parts uniform deep olive- 

 green, changing to dark grayish brown on terminal portion of remiges; 

 under parts bright lemon yellow, changing to olive-green on sides, 

 flanks, and thighs; bill black, or nearly so; iris brown; legs and feet 

 light horn brown (in dried skins). [In winter the plumage similar, 

 but mandible and maxillary tomia light horn brownish.] Length 

 (skins), 110-130 (119.4); wing, 58-60.5 (58.9); tail, 46-49 (47); exposed 

 cuhnen, 13-14 (13.8); tarsus, 21-23 (21.5); middle toe, 14-16 (15.4).' 



Adult female. — Above, including sides of neck, plain deep yellowish 

 olive-green, becoming more yellowish on forehead and superciliary 

 region; lores dull grayish; suborbital and auricular regions olive- 

 green, narrowly and indistinctly streaked with yellow; under parts 

 bright lemon yellow, the sides and Hanks olive-green; bill, etc., as in 

 adult male; length (skin), 117; wing, 55; tail, 43; exposed culmen, 14; 

 tarsus, 22; middle toe, 15.^ 



Young female, first plumage. — Above plain greenish olive, becom- 

 ing olive-green on upper tail-coverts and edges of rectrices; sides of 

 head paler olive; chin and upper throat pale buflfy olive, deepening on 

 lower throat and chest into deeper bufl'y olive, the sides and flanks 

 more decidedly olive; breast and abdomen pale buffy yellow. 



Yowng male (?), ^flrst plumage.^ — Similar to the young female, as 

 described above, but slightly more greenish olive above, and chin, 

 throat, breast, and abdomen bright olive-yellow. 



Southern Honduras (Segovia River) and eastern Nicaragua (Los 

 Sabalos, Greytown, Rio San Juan, Rio Escondido', etc.), to Costa Rica 

 (Jimenez, Talamanca, San Jose, etc.). 



Geothlypis bairdi Nutting, Proc. U. S. Nat. Mus., vi, Apr. 9, 1884, 398 (Los Saba- 

 los, e. Nicaragua; coll. TJ. S. Nat. Mus.)- — Ridgway, Proc. U. S. Nat. Mus., 

 X, 1885, 585 (Segovia R., Honduras).— Chekeie, Proc. U. S. Nat. Mus., 

 xiv, 1891, 527 (San Jos6, Costa Rica; crit.).— Richmond, Proc. U. S. Nat. 

 Mus., xvi, 1893, 485 (Rio Frio, Costa Rica; Greytown, Rio San Juan and 

 Rio Escondido, Nicaragua). 



Oeothlypis semiflava (not of Sclater) Sharpe, Cat. Birds Brit. Mus., x, 1885, 357 

 part (in synonymy). 



GEOTHLYPIS SPECIOSA Sclater. 

 ORIZABA YELLOW-THROAT. 



Adult male. — Head, except chin and throat, dull black, deepest on 

 loral and suborbital regions, duller on pileum, where passing gradually 



' Six specimens. The single adult male of G. s. semiflava examined measures as 

 follows: Wing, 60; tail, 53; exposed culmen, 13; tarsus, 23; middle toe, 15. 



^ One specimen. 



'Described from a specimen (sex not determined) collected by Mr. C. H. Town- 

 send on the Segovia River, southern Honduras, July ,3, 1887 (no. 112066, coll. U. S. 

 Nat. Mus.). 



