98 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



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

 mer plumage, but gray of upper parts tinged with olive, cinnamon- 

 rufous feathers of under parts margined terminally with white, max- 

 illa horn color with blackish culmen, and mandible dusky terminally. 



Adult female. — Similar to the male, but (at least usually) much 

 duller in color, with gray of upper parts lighter and browner and 

 encroaching more on head, the blackish feathers of which are more 

 or less conspicuously margined Avith grayish; cinnamon-rufous of 

 under parts paler (sometimes almost tawny-ochraceous), with white 

 margins to feather persistent in summer (in part at least) . 



Young. — Head as in adults, but the black duller and white orbital 

 markings less sharply defined, sometimes buffy; back and scapulars 

 grayish brown or olive, the feathers with central or mesial spots or 

 streaks of white or pale buff and blackish tips; rump and upper tail- 

 coverts brownish gray or grayish brown, the feathers sometimes nar- 

 rowly tipped with blackish; wings and tail as in adults, but wing- 

 coverts with terminal wedge-shaped spots or streaks of pale rusty, 

 buff, or whitish; chin and throat white or pale buffy, margined later- 

 ally with a stri})e of blackish or line of blackish streaks; under parts 

 cinnamon-rufous, ochraceous-tawny, or buft'y ochraceous (sometimes 

 the chest and breast much paler, occasionally whitish), conspicu- 

 ously spotted with black, the lower abdomen white or pale buffy. 



Adult /naZe.— Length (skins), 218-248 (232); wing, 129.5-139.5 

 (134.3); tail, 96.5-106.5 (101.4); exposed culmen, 18.5-21(19.9); tar- 

 sus, 32-34.5 (33.1); middle toe, 20-23.5 (21.9) .« 



Adult female.— Length (skins), 215-223 (220); wing, 126-130.5 

 (128.2); tail, 93-96.5 (94.7); exposed culmen, 19-21 (20); tarsus, 

 32.5-34.5 (32.7); middle toe, 20.5-23 (21.5).^ 



a Eighteen specimens. 

 b Four specimens. 



Alaskan specimens compare in average measurements Avith those from Labrador, 

 etc., as follows: 



Locality. 



MALES. 



Ten adult males from Ungava (3), Labrador (3), Ontario 

 (Moose Factory, 1), Minnesota (1), New York (1), and 

 Rhode Island (1) 



Eight adult males from Alaska 



FEMALES. 



Two adult females from LTngava and Labrador 



Two adult females from Alaska 



Middle 

 toe. 



21.9 

 21.9 



There seems to be no difference in coloration. 



