304 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult male in autumn and winter. — Similar to the spring and sum- 

 mer plumage, but black of crown, etc., more or less obscured by brown- 

 ish tips to the feathers, that of chest by narrow tips of pale yellowish 

 gray, yellow of superciliary stripe, throat, etc., deeper, white of chest 

 more or less broken by pale grayish brown tips to the feathers, color 

 of occiput, etc., much duller, more olivaceous (the vinaceous color 

 concealed), dusky centers to feathers of back, etc., much less distinct, 

 browner, and middle wing-coverts broadly margined with wliitish. 



Adult female in spring and summer. — Smaller and much duller in 

 color than the male, the whole pileuni grayish brown streaked with 

 dusky, black area on side of head reduced in extent, duller black or 

 merely dusky, the feathers narrowly tipped with dull whitish (except 

 in worn midsummer plumage); jugular patch also reduced in size; 

 superciliary stripe, throat, etc., paler and duller yellow; upper parts 

 more extensively streaked, with little of vinaceous showing on hind- 

 neck or upper tail-coverts; otherwise essentially as in the male. 



Adult female in autumn and winter. — Similar to the spring and sum- 

 mer plumage, but general color of upper parts slightly grayer (less 

 brown), sides and flanks more distinctly streaked, breast marked wdth 

 more or less distinct triangular spots of grayish, and yellow of throat, 

 etc., rather deeper. 



Young, frst plumage. — Pileum blackish (the feathers light brownish 

 basally) speckled with yellowish white; rest of upper parts mixed 

 brown and dusky, the feathers with a small terminal triangular spot 

 of yellowish white, the scapulars brown, with a subterminal trans- 

 verse spot of black and broad terminal margin of yellowish white; 

 lesser and middle wing-coverts dusky, \^ith large terminal spots of 

 dull yellowish white; greater coverts and remiges deep hair brown 

 edged with brownish buff, the brown color darker just within this 

 buff margin, which passes terminally into yellowish white; a super- 

 ciliary stripe and suborbital spot of pale straw or prinu'ose yellow, the 

 rest of side of head dusky speckled with whitish ; chin and throat pale 

 straw yellow or dull primrose y^^llow, this color extending across sides 

 of neck, immediately behind auricular region, almost to posterior end 

 of the superciliary stripe; chest pale brownish buffy, more or less 

 distinctly spotted w4th dusky; rest of under parts very pale yellow 

 or yellowish white. 



Adult male. — Length (skms), 160-180(172) ;« wmg, 108-113 (111.5); 

 tail, 66.5-75 (71.8) ; exposed culmen, 11-13 ( 12.2) ; tarsus, 22-25 (24) ; 

 middle toe, 13-14 (13.5).^ 



Adult female.— Length (skins), 155-170 (161);« wing, 101-109 

 (103.8); tail, 60.5-66.5 (63.1); exposed culmen, 10.5-12 (11.1); tar- 

 sus, 22-24 (23.2); middle toe, 11.5-14 (12.8)." 



a Five specimens. b Fifteen specimens. 



