560 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



gray edgings, the middle and greater wing-coverts broadly tipped with 

 white, forming two conspicuous bars across wing; inner webs of three 

 lateral rectrices extensively white terminally, this occupying the ter- 

 minal half or more of the outermost rectrix; bill blackish, with paler 

 tomia; iris brown; legs and feet dark horn brownish (in dried skins). 



Adult male m autumn and winter. — Similar to the spring and sum- 

 mer plumage, but all the black areas much broken or obscured; that 

 of pileum and hindneck by broad olive-green margins to the feathers, 

 the black forming mesial or central streaks, that of the auricular patch 

 overlaid by olive-green tips to the feathers, and that of the throat 

 replaced by nearly uniform lemon yellow, with black appearing as 

 spots or blotches on sides of chest; black streaks of back, etc., more or 

 less concealed. 



Young male in first autumn imd winter. — Similar to the adult male 

 of corresponding season, but black streaks on pileum, back, etc. , obso- 

 lete, and yellow of throat paler. 



Adult ferncde in spring and siimmer. — Very similar in coloration to 

 the autumn and winter adult male, but black streaks on upper parts 

 much narrower (sometimes nearly obsolete, usually mere shaft-lines), 

 the streaks on sides also usuall}' narrower, sometimes indistinct; pileum 

 sometimes blackish, and throat often blotched with black, occasionally 

 extensively so. 



Adult female in autumn and winter. — Similar to the spring and 

 summer plumage, but upper parts slightly browner olive-green, with 

 the streaks obsolete, or nearly so; sides and flanks tinged with brownish. 



Yoking female in first autum.n and winter. — Similar to the adult 

 female of corresponding season, but the yellow paler and the markings 

 in general less distinct. 



Adult male.— Length, (skins), 107-122 (114.4); wing, 65-69 (67.2); 

 tail, 48-51 (50); exposed culmen, 8-9 (8.6); tarsus, 18-19 (18.8); mid- 

 dle toe, 10-12 (11).^ 



Adult female.— h&ngth. (skins), 108-125 (116.2); wing, 63-66 (64.5); 

 tail, 49-50 (49.5); exposed culmen, 8-10 (9.2); tarsus, 18-19 (18.7); 

 middle toe, 9-11 (10).' 



Western North America; breeding from mountains of southern Cal- 

 ifornia to Alaska (Skagway, Glacier, west shore of Lake Lebarge, 

 south end of Lake Marsh, etc.), eastward to eastern Oregon (Camp 

 Harney), northwestern Idaho (Fort Sherman), etc. ; during migration 

 eastward to Eocky Mountains (Colorado, etc.), western Texas (Tom 

 Green and San Angelo counties), and southward over western and 

 and central Mexico to highlands of Guatemala (Duenas), Tres Marias 

 Islands, and extremity of Lower California. Accidental near Phila- 

 delphia, Pennsylvania (one specimen, spring of 1868). 



^ Five specimens. " Four specimens. 



