752 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



length (skins), 75-90 (81); wing, 59.5-63 (60.6); tail, 25-27 (26); 

 exposed culmen, 9-10 (9.4); tarsus, 14.5; middle toe, 8.5-10 (9.2).« 

 Adult female.^ — Pileum and hindneck and sides of head and neck 

 plain slate color, slightly tinged with olive-green ; back and scapulars 

 uniform olive-green, the rumpj upper tail-coverts, and tail more 

 grayish olive-green; wing-coverts slate-grayish, shghtly tinged with 

 olive-oreen ; remiges grayish brown, the secondaries with outer webs 

 mostly olive-green, the primaries edged with gray; chin and throat 

 light gray, washed with olive-green, chest uniform, rather light, olive- 

 green; rest of under parts grayish washed with olive-green, passing 

 into dull yellowish white on abdomen and under tail-coverts ; axillars 

 and under wing-coverts light gray; bill, legs, and feet as in the male; 

 length (skin), 85; wing, 61; tail, 29; exposed culmen, 10.5; tarsus, 

 14.5; middle toe, 9.5.^= 



a Four specimens. 



& Since Hellmayr, who refers the Panama birds of this species to P. p. pipra, 

 describes the adult female of that form as having the pileum and hindneck as olive- 

 greenish though in most specimens "distinctly mixed with grayish," it is possible the 

 specimen described above is wrongly sexed and is really a young male. Hellmayr, 

 however, apparently had no female from any Panama locality, and it may be, therefore, 

 that the female of the Panama form in reality has the pileum and hindneck slaty, as 

 in females of P. p. coracina and P. p. comata. 



Immature males of the Bahia form (and probably also other forms) have the whole 

 pileum white, as in adult males, but the rest of the plumage, instead of being black, 

 is deep olive-green above (becoming slaty on upper back and hindneck) and plain 

 slate-gray beneath, slightly tinged on chest and sides with olive-green. A similar 

 stage of plumage probably occurs in the Panama form. 



c One si^ecimen (from Cordillera de Tole, Panama). 



