206 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
brownish gray, the feathers with paler margins and more dusky 
subterminally; 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 brownish 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 superciliary 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 light 
‘cinnamon-rufous; axillars and under wing-coverts white, sparsely 
marked with grayish; bill black terminally, more brownish basally; 
iris brown; legs and feet dull yellowish green to yellowish olive or 
olive-yellowish. 
Adults in winter—Upper parts plain brownish gray, the tail- 
coverts, etc., asin summer; superciliary stripe and under parts white, 
the chest, sides of neck, and under tail-coverts narrowly streaked 
with gray; no bars on under 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.—Wing, 116-135 (124.4); tail, 45-53 (51.1); exposed 
culmen, 35.5-41 (38.5); tarsus, 36-43 (39.9); middle toe, 21-22.5 
(21.5).¢ 
Adult female—Wing, 120-187 (127); tail, 44-58 (51.5); exposed 
culmen, 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 Mississippi Valley, through Mexico 
(Matamoros, Tamaulipas; Laguna de Rosario, Tlaxcala; Zacatecas; 
San Mateo, Oaxaca), Guatemala (Duefias), Nicaragua (Momotombo), 
West Indies (Cuba; Jamaica; Porto Rico; Sombrero; Anegada; 
St. Bartholomew; Barbados; Grenada), Trinidéd, etc., to Peru 
(Chorillos; Nauta; Yquitos; Rio Ucayali), Ecuadér (Babahoyo; 
@ Hight specimens. 5 Four specimens. °* 
