NO. I AVIFAUNA OF PANAMA — WETMORE 9 



fact that should be borne in mind in comparing specimens in which 

 the sex is not marked. Juvenile birds differ from adult females in 

 more greenish back, hindneck, and crown, duller-colored rump, less 

 definite streaking on the back, and duller yellow of the under surface. 



TANGARA ICTEROCEPHALA ICTEROCEPHALA (Bonaparte) 

 Calliste icterocephala Bonaparte, Compt. Rend. Acad. Sci. Paris, vol. 31, No. 3 

 (seance du 20 janv.), 1851, p. 76. (Valley of Punta Playa, near Quito, 

 Ecuador.) 



Characters. — Similar to T. i. frantzii in bright coloration, but 

 with feathers of crown and nape somewhat greenish basally, so that 

 the yellow in this area appears less intense ; partly concealed ring 

 around the base of the hindneck deeper blue ; foreneck and throat 

 averaging faintly darker. 



Measurements. — Males (12 specimens), wing 71.2-75.0 (72.7), 

 tail 44.2-48.5 (45.8), culmen from base 12.1-12.5 (12.3), tarsus 

 16.0-17.3 (16.8) mm. 



Females (9 specimens), wing 66.6-72.3 (68.7), tail 41.9-46.2 (43.4), 

 culmen from base 12.2-14.2 (12.7), tarsus 16.2-17.5 (17.2) mm. 



Range. — Mountains of eastern Darien, Panama (Cerro Tacarcuna, 

 Cerro Pirre) south in the western Andes through Colombia to 

 southern Ecuador. 



TANGARA ICTEROCEPHALA ORESBIA subsp. nov. 



Characters. — Decidedly duller yellow throughout than either T. i. 

 frantsii or T. i. icteroceplmla; partly concealed band on hindneck 

 more greenish blue; foreneck and throat darker; sides and flanks 

 darker, with a greenish-yellow cast : Female, in addition, with edging 

 on back feathers more green, less yellow. 



Description. — Type, U.S.N.M. No. 433998, male, south face of 

 Cerro Campana, 850 meters elevation, western sector of the Province 

 of Panama, Panama, collected March 7, 195 1, by A. Wetmore and 

 W. M. Perrygo (original number 16221). Lores, a very narrow 

 line around eyelids, a small spot behind the eye, a narrow line pos- 

 terior to the nostrils, and another from the gape across the lower 

 margin of the cheeks to the nape, black ; crown and sides of head 

 slightly duller than light cadmium ; nape washed with pyrite yellow ; 

 band across hindneck bluish gray-green; back feathers distinctly 

 streaked, black centrally, edged broadly with sulphine yellow an- 

 teriorly, changing posteriorly to wax yellow; rump between light 

 cadmium and apricot yellow ; upper tail coverts oil green, tipped indis- 

 tinctly with warbler green ; wings and tail black ; lesser and middle 

 wing coverts edged with lettuce green, with a light tipping of lemon 



