56 - BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Adult male—Pileum and hindneck plain slate color, becoming 
paler (slate-gray) on supra-auricular region; back, scapulars, rump, 
and upper tail-coverts plain olivaceous-slate color (more decidedly 
olivaceous posteriorly) contrasting more or less strongly with slate 
color of hindneck and pileum; tail darker slaty olive or olivaceous- 
slate, the outermost rectrices usually narrowly tipped with whitish; 
auricular region slate color (usually somewhat darker than pileum), 
sometimes with very narrow shaft-streaks of whitish; lores and sub- 
orbital region slate-grayish indistinctly mottled or flecked with paler, 
the latter and posterior portion of the former sometimes uniform 
dark slate color; malar region pale gray or grayish white, indistinctly 
barred or transversely flecked with darker; outer web of exterior row 
of scapulars broadly edged with white, the white usually margined 
internally by a narrow line of dusky; lesser wing-coverts black, at 
least some of the feathers tipped, more or less distinctly, with white, 
the inner-anterior portion of the area occupied by a white patch; 
middle coverts black distinctly tipped with white; greater coverts 
slate color or slate-gray narrowly tipped with white; remiges similar 
in color to back, etc., the terminal portion of longer primaries more 
brownish; chin and throat white or grayish white; chest pale gray 
medially, darker (slate-gray) laterally, passing into light olive on 
flanks; breast (medially) white or yellowish white, passing into pale 
yellow (primrose to nearly straw yellow) on abdomen and under 
tail-coverts; under wing-coverts mostly pale yellow, the inner webs 
of remiges broadly edged with the same; maxilla dusky, paler on 
tomium; mandible paler (plumbeous in life); iris brown; legs and feet 
dusky (plumbeous in life); length (skins), 101-113 (108.5); wing, 
57-63 (59.4); tail, 37.5-41.5 (39.1); culmen, 14-15.5 (14.6); tarsus, 
18-20 (19.2); middle toe, 11-12 (11.4).4 
Immature male.—Similar to the adult male but remiges distinctly 
more brownish (nearly broccoli brown to light olive-brown), and 
breast yellowish, like abdomen. 
Adult female.—Pileum chestnut-brown or russet, the feathers with 
indistinct shaft-streaks of paler; hindneck similar but less rufescent 
brown; back, scapulars, and rump plain olive (varying from grayish 
to brownish olive); upper tail-coverts and tail sepia brown; general 
color of wings olive, the middle and greater coverts narrowly and 
rather indistinctly tipped with buffy or pale buffy brownish; a 
narrow orbital ring of whitish; auricular region dusky olive or slaty 
olive, with narrow shaft-streaks of whitish or pale buffy; malar 
region, chin, and throat white, usually more or less tinged with pale 
yellowish olive or dull yellowish; rest of under parts pale yellowish, 
passing into light olive or buffy olive on sides and flanks, the under 
tail-coverts buffy; bill, etc., as in adult male; length (skins), 96-112 
4 Fifteen specimens, 
