,^58 BULLETIN So, UKITED STATES NATIONAL MtfSEUM. 



flanks similar, but more or less tinged with buflf and with black streaks 

 rather narrower; under tail-coverts pale buffy or buffy white, nar- 

 rowly streaked with black; thighs plain buff or buffy white, sometunes 

 with a few very narrow streaks of dusky; under wing-coverts white, 

 becoming yellow along edge of wing; maxilla black or dusky, edged , 

 with paler; mandible grayish in dried skin (pale grayish blue in life) 

 with tip dusky; iris brown; legs and feet pale brownish in dried skins, 

 pale pinkish gray in life. 



Adult male in wmter. — Similar to the summer male, but with less 

 black and more brown above, the tips of the scapulars and interscapu- 

 lars broadly tipped with brown, laigely covering the black portion of 

 the feathers; blackish lateral stripes of pileum more broadly streaked 

 with brown, the median stripe more buffy; flanks, under tail-coverts, 

 etc., more buffy. 



Admit female-in .stammer.— Similar to the male, but much smaller; 

 lateral stripes of pileum more broadly streaked with brown, the post- 

 ocular stripe brown streaked with black, instead of uniform black; 

 sides of head and neck more buffy; black jugular crescent relatively 

 smaller, the feathers usually more or less tipped with light grayish; 

 yellow of throat, breast, etc., rather duller. 



Adult female in winter. — Similar to the summer female, but browner 

 above, with the black spots on back and scapulars more concealed, 

 and the white parts more buffy. 



Yo^mg. — Above much like adults, but the scapulars, interscapulars, 

 and tertials margined terminally with whitish or buffy; head-stripes 

 less sharply defined, the superciliary stripe dull buffy throughout; 

 yellow of breast, etc., very pale and dull, changing gradually into 

 the buffy of sides, flanks, etc., the latter much less distinctly or 

 sharply streaked; black jugular crescent wanting, but in its place a 

 cluster of dusky spots or flecks occupying approximately the same area. 

 Advlt mrde.—L,ength (skins), 215.9-265 (235.5); wing, 114.3-129 

 (122.4); tail, 67.6-86.4 (78.7); culmen, from base, 30.7-36.8 (34.3); 

 tarsus, 38.9^6.2 (41.9); middle toe, 27.2-32.8 (30.2).^ 



Adult female.— L^ength (skins), 190.5-215.9 (202.9); wing, 104.6- 

 113.8(107.4); tail, 65.8-73.7 (67.6); culmen, from base, 26.9-31.6(30); 

 tarsus, 36.1-40.6 (37.3); middle toe, 25.4-30 (27.2).' 



(Nearly all of the above breeding birds.) 

 " Eight specimens. 



