54 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



region dusky; bill horn color, darker terminally; legs and feet dusky; 

 length (skins), 137.16-166.13 (148.34); wing, 84.58-91.44 (88.65); tail, 

 50.80-59.44 (54.86); exposed culmen, 15.75-17.53 (16.51); depth of 

 bill at base (three specimens), 9.14-9.91 (9.65); tarsus, 15.49-17.02 

 (16.26); middle toe, 11.18-13.21 (12.19).' 



Adult female. — Wings and tail as in adult male; scapulars dusky 

 centrally, margined with olive or grayish; rump light yellow (usually 

 maize or naples yellow) ; rest of upper parts with feathers dusky cen- 

 trally, broadly margined with olive or olive-yellowish, producing a 

 spotted or streaked appearance; posterior under parts as in the adult 

 male, but more anterior portions dull light olive-grayish, the feathers 

 with more or less conspicuous central spots or streaks of dusky, the 

 breast usually more or less strongly tinged or overlaid with olive- 

 yellowish; length (skins), 132.08-157.99 (143.61); wing, 82.80-90.17 

 (85.34); tail, 48.77-59.18 (54.36); exposed culmen, 16.24-16.76 (15.75); 

 depth of bill at base (one specimen), 10.16; tarsus, 15.24-17.27 (16.00), 

 middle toe, 11.18-12.70 (11.94).^ 



Yoiong. — Conspicuously streaked, both above and below, with dusky 

 on a dull whitish or partly pale olivaceous ground; wings and tail much 

 as in adult female, but the white markings of the former more restricted 

 and more or less tinged with pale buffy or yellowish. 



Breeding in coniferous forest districts of northern North America, 

 south to Prince Edward Island, New Brunswick, Maine, New Hamp- 

 shire (White Mountains), northern New York (Adirondacks), northern 

 Michigan (Mackinac Island), etc;' in winter south, irregularly, to 

 District of Columbia, southern Ohio (near Cincinnati), central Indiana 

 (Indianapolis, Bloomington, etc.), southern Illinois (Richland County), 

 Kansas, Colorado, Nevada (East Humboldt Mountains), British Colum- 



^ Eighteen specimens. 



^ Fifteen specimens. 



Eastern and northwestern specimens differ in average measurements, as fdllows: 



There is not a sufficient number of comparable specimens available to enable me 

 to determine whether there is any difference in plumage between specimens from 

 the two regions. 



' Southern limit of breeding range on Pacific side not yet ascertained. 



