318 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



longer and broader, with rounded instead of acuminate tip; a broad 

 postocular (supra-auricular) streak, long rictal (subauricular) streak, 

 of buff (more or less deep); auricular region dull blackish; median 

 portion of chin and throat (broadly) ochraceous-buff to almost 

 tawny, the lateral portions dusky; rest of under parts (except under 

 tail-coverts) plain mouse gray or slate-gray, the sides usually glossed, 

 more or less, with metallic bluish green; under tail-coverts grayish 

 white, with a central V-shaped mark of grayish (sometimes glossed 

 with bluish green or greenish blue) ; lateral rectrices margined ter- 

 minally with white, especially on outer web; bill, etc., as in adult 

 male; length (skins), 154-168 (158); wing, 57-62.5 (60); tail, 61-72 

 (67.7); culmen, 38-42.5 (40.S).« 



Immature Tnale. — Similar in coloration to the adult female but 

 having the narrowed tip of middle rectrices much smaller, narrower, 

 and (usually) more pointed, as in adult males. 



Young male. — Similar to the immature male (as described above) 

 but feathers of rump and lower back, also those of hindneck (some- 

 times those of whole upper surface) margined terminally with brown- 

 ish buffy, those of sides of throat and chest also with indistinct 

 buffy or paler tips or margins. 



Young female. — Similar in coloration to the young male but 

 middle pair of rectrices with the narrowed terminal portion much 

 longer and broader and more rounded at tip. 



Costa Rica (Angostura; Tucurriqui; Turrialba; Coliblanco; Per- 

 alta; Carrillo; Volcan de Irazu; Juan Vinas; La Estrella de Cartago; 

 Naranjo de Cartago; Tres Rios; La Hondura; Cariblanco de Sara- 

 piqui; La Vijagua; Peorsnada; Ojuras de Terraba; Dota Mountains; 

 Los Reyes, Santa Maria de Dota; El General; Pozo del Rio Grande; 

 Barranca) and Panama (Boquete; Volcan de Chiriqui; Laguna 

 del Castillo; Calovevora; Cordillera del Chucu; Santa Fe de Veragua); 

 northwestern Colombia (Truando Falls) ? 



o Fourteen specimens. 



