506 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



with olive, more or less broadly, but indistinctly, streaked with 

 darker; rest of under parts white (often more or less tinged with pale 

 yellow), the sides of throat and median portion of chest streaked with 

 brownish gray, the under tail-coverts with broad sagittate or V-shaped 

 markings of the same; axillars and under wing-coverts brownish gray 

 narrowly edged with paler; a conspicuous patch of soft, fluffy w^hite 

 or yellowish white feathers above flanks (on sides of rump), usually 

 concealed but capable of being spread over secondaries of the closed 

 wing; maxilla brownish black, mandible pale brownish with more or 

 less of terminal portion dusky; iris brown; legs and feet dusky brown 

 or brownish black. 



Young. — Essentially like adults, but middle and greater wing- 

 coverts narrowly margmed terminally with brownish buffy, the 

 secondaries edged with the same or brownish white; general color 

 of upper parts, sides, etc., more brownish or sooty, and under tail- 

 coverts sometimes immaculate white. 



Adult male. —hength (skins), 165-188 (175) ; wdng, 105-114.5 (109.9) ; 

 tail, 68-77.5 (71.9); exposed culmen, 15.5-18.5 (17.1); tarsus, 14.5- 

 15.5 (14.9); middle toe, 11.5-12.5 (12).« 



Adult female.— J^ength (skins), 157-180(168); wing, 98.5-110.5 

 (104.7); tail, 63-71.5 (68.3); exposed culmen, 15-18 (16.7); tarsus, 

 14.5-16 (15); middle toe, 11-12 (11.4).'' 



Breeding from shores of Hudson Bay to Alaska (Caribou Crossing; 

 Six Mile River; Bennett; Yukon Valley), and southward, in coniferous 

 woods, to Massachusetts (Mount Auburn and Brookline, near Boston; 

 Lynn; Winchendon; Berkshire County, etc.), mountains of Penn- 

 sylvania (Lycoming County; Perry County?; Lancaster County?), 

 northern New York, northern Michigan (Crawford and Oscoda coun- 

 ties), northeastern Illinois (Cook County)?, and western Kansas (near 



" Nineteen specimenvS. 

 b Eleven specimens. 



Locality. 



MALES. 



Three adult males from Atlantic States 



Nine adult males from Rocky Mountain district. 



Five adult males from Pacific coast district 



Two adult males from Alaska 



% FEMALES. 



One adult female from Maine 



Seven females from Rocky Mountain district... 

 Three adult females from Pacific coast district. 



Middle 

 toe. 



I am unable to appreciate any constant color differences according to locality. 



11.5 

 12.1 

 12.1 

 12.3 



11 



11.4 

 11.5 



