270 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



rectrices dusky, narrowly edged with pale grayish brown, the rest of 

 tail ligiit grayish brown or pale drab, the rectrices narrowly edged 

 with paler; a superciliary stripe of dull white, narrowly streaked, 

 especially posteriorly, with dusky; an indistinct loral stripe of light 

 grayish brown, minutely flecked with dusky, the upper portion of 

 auricular region light brown narrowly streaked with dusky; rest of 

 head, neck (all round), and chest dull brownish white (inclining to 

 pale buffy grayish brown on chest) distinctly streaked with dusky, 

 the chin and upper throat, however, immaculate white or buffy 

 white; rest of under parts immaculate white, or buffy white, the 

 sides and flanks, however, usually with a few narrow shaft streaks 

 of dusky; axillars and under wing coverts, except near edge of wing 

 (where spotted with grayish brown) immaculate white; bill blackish 

 terminally, more brownish basally (where dull greenish yellovr in 

 life); iris brown; legs and feet dusky brown (dull greenish yellow or 

 yellowish green in life). 



Winter plumage. — Similar to the summer plumage but the cinna- 

 mon or rusty tinge to scapulars, etc., absent and the black and dusky 

 markings less sharpl}^ defined. 



Young. — Similar to the summer adult but scapulars and outermost 

 interscapulars margined terminally on outer webs with white, and 

 the chest, etc., more buffy and more narrowly or less sharply streaked. 



Downy young. — Head light grayish buff' (between pinkish buff and 

 vinaceous-buff), fading- into buffy whitish on chin and throat; a 

 rather broad median frontal streak of black, a narrow loral line of the 

 same (throwing off a short vertical branch toward anterior angle of 

 eye and a narrow branch beneath suborbital region), a still narrower 

 postocular streak, and a small longitudinal spot near rictus; crown 

 and occijmt marbled with black and dark chestnut or burnt iniiber, 

 and with a few mottlings of buffy, this dark-colored area margined 

 laterally by a broad but irregular stripe of immaculate pale grayish 

 buff, separated from a broad superciliary stripe of the same by a 

 narrower irregular stripe of blackish brown; hindneck mottled or 

 marbled witri pale grayish ]:)rown, and dusky; general color of bark 

 and rump russet, intermixed with black and dotted or spangled with 

 pale grayish Iniffy ; wing mostly immaculate russet ; under parts dull 

 buffy white deepening into brownish buff on chest and strongly tinged 

 on posterior portion with the same. 



Adult male.— Wmg, 137-146 (139.8); tail, 59-65 (62.4); exposed 

 culmen, 26-29.5 (28.4); tarsus, 27-30 (27.7); middle toe. 21.5-24.5 

 (23.6).« 



Eight specimens. 



