206 BULLETIN 50^ UNITED STATES NATIONAL MUSEUM. 



brownish gray, the feathers with paler margins and more dusky 

 sub terminally; upper tail-coverts white, the longer ones barred or 

 spotted with dusky, the anterior ones more or less streaked with the 

 same; tail rather light bro\vnish gray, the inner webs of rectrices 

 (except middle pair) partly white (on the lateral ones mostly so), 

 irregularly marked, longitudinally, with brownish gray; sides of 

 head and neck and under parts white, the suborbital, subauricular, and 

 malar regions, lower throat, foreneck, and chest narrowly streaked 

 with dusky, the supercihary region, chin, and upper throat nearly 

 immaculate, the breast, sides, flanks, and upper abdomen rather 

 broadly barred with dusky, the under tail-coverts irregularly marked 

 with the same; auricular region and (usually) sides of occiput hght 

 cinnamon-rufous; axillars and under wing-coverts white, sparsely 

 marked with grayish; bill black terminally, more brownish basally; 

 iris brown; legs and feet duU yellowish green to yellowish oUve or 

 ohve-yellowish. 



Adults in winter. — Upper parts plain brownish gray, the tail- 

 coverts, etc., as in summer; supercihary stripe and under parts white, 

 the chest, sides of neck, and under tail-coverts narrowly streaked 

 with gray; no bars on un,der parts nor rufescent auricular area. 



Young. — Back and scapulars blackish or dusky, the feathers 

 broadly margined with pale buff or buffy whitish, the middle of back 

 sometimes tinged with rusty; wing-coverts margined with pale 

 buff and white; upper tail-coverts nearly immaculate white; pileum 

 streaked with dusky, pale buff, and grayish, the hindneck nearly 

 uniform gray; under parts soiled white, the chest and sides more or 

 less strongly suffused with buff, the former, together with flanks and 

 sides of neck indistinctly streaked with grayish. 



Adult male.—Wmg, 116-135 (124.4); tail, 45-53 (51.1); exposed 

 cuhnen, 35.5-41 (38.5); tarsus, 36-43 (39.9); middle toe, 21-22.5 

 (21.5).« 



Adult female.— Wing, 120-137 (127); tail, 44-58 (51.5); exposed 

 cuhnen, 36-44 (39.9); tarsus, 39.5-45 (42.9); middle toe, 21-24 

 (22.2) .«' 



North America (except west of Rocky Mountains), Middle America, 

 and greater part of South America; breeding in northern Mackenzie 

 (and probably southward to central Keewatin) ; migrating southward, 

 chiefly through western portion of Mssissippi Valley, through j\Iexico 

 (Matamoros, Tamaulipas; Laguna de Rosario, Tlaxcala; Zacatecas; 

 San Mateo, Oaxaca), Guatemala (Dueilas), Nicaragua (Momotombo), 

 West Indies (Cuba; Jamaica; Porto Rico; Sombrero; Anegada; 

 St. Bartholomew; Barbados; Grenada), Trinidad, etc., to Peru 

 (Chorillos; Nauta; Yquitos; Rio UcayaU), Ecuador (Babahoyo; 



o Eight specimens. ^ Four specimens. 



