3\)4 



BULLETIN aO, UNITED STATES NATIONAL MUSEUM. 



RHYNCHOCYCLUS CINEREICEPS ( Sclater"). 

 GRAY-HEADED FLYCATCHER 



Similar in coloration of under parts to B. marginatus, l)ut upper 

 ])arts much paler, with olive-green of back, etc., more yellowish and 

 without clear yellow tips or edgings to wing-coverts; larger. 



Adults (sexes alike). — Pileum and hindneck plain slate-gray; back, 

 sca]:)ulars, rump, upper tail-coverts, and lesser wing-coverts plain yel- 

 lowish olive-green; tail deep grayish brown (dark hair brown) the 

 outer web of rectrices edged with olive-green ; wings dusky with yel- 

 lowish olive-green edgings, these more yellowish on secondaries (espe- 

 cially on the inner, where broader), usually more greenish on greater 

 coverts; a narrow grayish wliite supraloral line; a white orbital 

 ring, interrupted anteriorly by a triangular dusky spot at anterior 

 angle of eye; auricular, suborbital, and malar regions gray, fading 

 into Y>ideT gray on chin, throat, and chest, the last very faintly tinged 

 with pale yellow; rest of under parts, including axillars and under 

 wing-coverts, sulphur yellow, the sides, especially sides of breast, 

 linged with olive; a dusky grayish spot on under primary coverts; 

 inner webs of remiges edged with yellowish white; maxilla black; 

 mandible pale brownish (pale grayish or lilaceous in life) ; iris white 

 or grayish white; legs and feet light brownish in dried skins (flesh 

 color or lilaceous in life). 



Adult male.— Leno-th (skins), 118-136 (129); wing, 60.5-68.5 (64.3); 

 tail, 55-61 (56.9); exposed cuimen, 11.5-13.5 (12.2); tarsus, 17-19 

 (17.9); middle toe, 9-11 (9.9).« 



Adult female.— Lencrth (skins), 120-135 (126); wing, 60-66.5 (63.2); 

 tail, 50-59 (54.9); exposed cuimen, 12-13.5 (12.7); tarsus, 17-19 

 (18.1); middle toe, 9.5-10.5 (10.1).'' 



a Nineteen specimens. 

 t> Fourteen specimens. 



Specimens from separate geographic areas compare as follows in average measure- 

 ments: 



Apparently there are no color differences. 



