858 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



flanks siiiiiliir, I)ut more or less tinoed with bufl' and with bhick streaks 

 rather narrower; under tail-eoverts pale Initty or butty white, nar- 

 rowly streaked with l)laek; thighs plain buff or buffy white, sometimes 

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

 becoming yellow along edge of wing; maxilla black or dusk}', edged 

 with paler; mandible gra^dsh 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 winter. — Similar to the summer male, but with less 

 black and more ])rown above, the tips of th(> 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, th(^ median stripe more Imfty; flanks, under tail-coverts, 

 etc., more ])uiiy. 



Adult female in .vwvwmer.— Similar to the male, l)ut nuich smaller; 

 lateral stripes of pileum more broadly streaked with ])rown, the post- 

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

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

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

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



Adult feiiiide in winter. — Similar to the sunnner female, but l)rowner 

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

 and the white parts more buffy. 



Young. — Above nuich like adults, but the scapulars, interscapulars, 

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

 less sharply dettned, the superciliary stripe dull butty throughout; 

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

 the butty 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 approximateh' the same area. 



Adtdt ,n(de.— Length (skins), 215.9-255 (235.5); wing, 114.3-129 

 (122.4); tail, 67.6-80.4 (78.7); culmen, from base, 30.7-36.8 (34.3); 

 tarsus, 38.9^6.2 (41.9); middle toe, 27.2-32.3 (30.2).^ 



Adult female.— Length (skins), 190.5-215.9 (202.9); wing, 104.6- 

 113.8(107.4); tail, 65.8-73.7 (67.6); culmen, from base, 26.9-31.5(30); 

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



^ Twenty-one specimens, the average according to locality being as follows: 



Locality. 



Wing. 



Seven adult males from New England States 



Fourteen adult males from eastern Middle States.. 

 Nine adult males from upper Mississippi Valley ... 



(Nearly all of the al)ove breeding birds. 

 ^ Eight specimens. 



Tail. 



123.2 80.3 

 r21.9 78 

 118.1 75.2 



Culmen 

 from 

 base. 



35. 3 41. 9 

 33.8 1 41.9 

 33.5 40.4 



Middle 

 toe. 



30.5 

 30.2 



28.5 



