BIRDS OF NORTH AND MIDDLE AMERICA. 157 



Adult male in winter. — Similar to the summer pluma(j;e, ])iit blue of 

 upper parts duller, that of pileum, hindneck, back, and scapulars more 

 or less obscured by pale brownish j^jray maro;ins or tips, the greater 

 wing-coverts and tertials edged with whitish or pale grayish; blue of 

 under parts washed, more or less strongly, with pale brownish gray 

 or grayish brown, especially on chest and sides of breast. 



Adult female in summer. — Pileum, hindneck, back, and scapulars, 

 ])lain mouse gray or smoke gray, sometimes faintly tinged with green- 

 ish l)lue; rum]), upper tail-coverts, tail, and remiges (except tertials), 

 turquoise or light cerulean blue, sometimes inclining toward nile blue; 

 tertials and greater wing-coverts similar in color to back, etc., but 

 darker, edged w^ith paler, and sometimes tinged with blue; lesser and 

 middle wing-coverts dull greenish blue, or else dusky brownish gray 

 margined with bluish; an orbital ring of dull white; auricular region 

 similar in color to pileum, etc., but rather browner; chin, throat, 

 chest, breast, and sides, pale brownish gray (sometimes more buffy 

 gray), passing into dull white on abdomen, hinder flanks, anal region, 

 and under tail-coverts, the longer of the latter with dusky shaft- 

 streaks and sometimes tinged with blue; bill, iris, legs, and feet as in 

 the male. 



Adult female in winter. — Similar to the summer ])lumage but, color- 

 tioii slightly deeper, especially the bufl"y grayish of under parts. 



Young male. — Pileum, hindneck, back, and scapulars light brownish 

 gray or drab-gray the interscapular area usually more or less streaked 

 with white; rump and upper tail-coverts light ash gray; remiges and 

 rectrices as in adults, but with distinct terminal margins of white 

 (duller on remiges), the tertials dusky gray with pale gray or dull 

 whitish margins; middle wing-coverts brownish gray margined ter- 

 minally with dull white or brownish white ; greater-coverts dull blue, 

 margined terminally and edged with pale gray or whitish; a conspic- 

 uous orbital ring of white; lores grayish white, sufl'used with dusky 

 in front of eye, and margined above by dusky; auricular region 

 brownish gray or pale grayish brown, indistinctly streaked with 

 paler; throat and upper chest pale gray (passing into dull white on 

 chin), indistinctly streaked with whitish; chest, sides, and flanks 

 squamately streaked (broadly) with grayish brown or drab, the center 

 of the feathers being white; rest of under parts white. 



Young female. — Similar to the young male, but blue of wings and 

 tail much duller and (especially that of wings) greener; color of 

 black, etc., browner. 



^(Z?i/^wa/('.— Length (skins), 162-lSO (169); wing, 112.5-121.r> 

 (117.6); tail, 68.5-76 (72); exposed culmen, 12.5-14 (18.4); tarsus, 

 21.5-24 (22.6); middle toe, 14.5-17 (15.5). « 



a Sixteen specimens. 



