746 



BULLETIN 50, TTNITED STATES NATIONAL MUSEUM. 



PIPRA MENTALIS MENTALIS Sclater. 

 YELLOW-THIGHED MANAKIN. 



Adult male. — Head and neck, except chin and throat, intense 

 flame scarlet or orange-vermilion, becoming paler and more orange 

 on forehead, the feathers pale yellow or yellowish white basally; 

 chin (more or less extensively) pale j^ellow or yellowish white; thighs 

 pale (primrose or straw) yellow; axillars and innermost under wing- 

 coverts pale (primrose) yellow; inner webs of remiges grayish brown, 

 the primaries passing into grayish white, the secondaries into pale 

 yellow or yellowish white on edges for basal half (approximately) ; 

 rest of plumage uniform black; maxilla horn brown, paler on tomia; 

 mandible pale brownish (flesh colored in life) ; iris white ; " legs and 

 feet Isabella color; « length (skins), 89-110 (100); wing, 53.5-61.5 

 (58.4); tail, 25-29.5 (27.8); exposed culmen, 8.5-10 (9.4); tarsus, 

 14-16 (15); middle toe, 9.5-11 (10.1).^ 



Adult female. — Above plain greenish olive or dull olive-green; 

 beneath decidedly paler olive, still paler and sometimes sufi"used 

 \\'ith pale yellowish, on chin and throat and also on abdomen, thighs, 

 and under tail-coverts, which sometimes incline to olivaceous prim- 

 rose yellow or greenish straw yellow; axillars and innermost under 

 wing-coverts pale (straw or primrose) yellow; bill and feet as in adult 

 male; length (skins), 97-116 (104) ; wing, 59.5-63 (61.3) ; tail, 29.5-33.5 

 (31.6) ; exposed culmen, 9.5-11.5 (10.1) ; tarsus, 14-15.5 (14.9) ; middle 

 toe, 9-10.5 (9.9).^ 



closely two specimens from Chamicuros, eastern Peru, botli determined as females, 

 one of which has the pileum and hindneck much more strongly tinged with olive- 

 green, while the other has them less so, the gray being at the same time slightly darker. 

 These two Peruvian l)irds further agree with the Bahia specimen in their very short 

 tail (only 26 mm. in l:)oth specimens, the wing being 59.5 and 60), and it is therefore 

 possible the bird from eastern Peru may be referable to P. p. hahise, thougli its status 

 can not be determined without examination ofadult males. 



«G. W. Richmond, Proc. IT. S. Nat. Mus., xvi, 1893, 509. 



^ Nineteen specimens. 



c Fourteen specimens. 



Notwithstanding the very small size of specimens from southern Honduras, thoy 

 are according to coloration strictly referable to the northern form. 



