334 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



fusion of chestnut-bro vn ; outer webs of innermost greater wing-coverts 

 and tertials inclining more or less to chestnut-brown; middle and 

 greater coverts tipped with white, forming two distinct bands; sides of 

 head dull grayish, the suborbital and malar regions sometimes flecked 

 with dusk}-; under parts dull brownish gray, somewhat paler on chin 

 and throat, nearly white on abdomen, light buffy brownish or pale 

 Isabella color on sides and flanks, which are sometimes obsoletely 

 streaked; under tail-coverts light grayish brown or drab, broadly mar- 

 gined with pale buffy; maxilla dusky, mandible paler; iris brown; 

 legs and feet pale brownish; length (skins), 150.88-181.10 (170.18); 

 wing, 75.95-83.31 (79.50); tail, 78.41-88.31 (76.20); exposed culmen, 

 11.18-18.21 (12.19); depth of bill at base, 7.87-8.13 (8.04); tarsus, 

 23.37-25.65 (24.48); middle toe, 17.02-18.29 (17.78).' 



Adult female. — Similar to the male, sometimes hardly distinguish- 

 able, but usually with the lateral black stripes of the pileum narrower 

 and less intensely black, the yellow of the crown-spot rather paler, 

 and the gray of occiput more or less streaked with dusky; length 

 (skins), 156.21-168.91 (168.58); wing, 73.66-80.52 (78.23); tail, 68.88- 

 82.55 (75.95); exposed culmen, 11.43-12.70 (11.94); depth of bill at 

 base, 7.62-7.87 (7.71); tarsus, 23.87-24.89 (24.18); middle toe, 15.75- 

 17.58 (17.02).' 



Immature {young in. first winter?). — Similar to adult female, but 

 without any lateral black stripe on pileum or well-defined median stripe, 

 the whole forehead and anterior portion of crown yellowish olive, more 

 or less flecked with dusky (sometimes with more or less indication of 

 a black lateral stripe), the posterior portion of the pileum light grayish 

 olive-brown, streaked with dusky. (Young not seen.) 



Pacific coast and Bering Sea districts of North America; breeding 

 on the Shumagin Islands, Alaska Peninsula, Kadiak, and more western 

 parts of the Alaskan mainland, including the shores of Bristol Bay, 

 Norton Sound, and Hotham Inlet (north to Kotzebue Sound), and 

 south ^ at least to the summit of White Pass and highlands about Lynn 

 Canal and Glacier Bay; migrating southward in winter through south- 

 fern Alaska, British Colmnbia, Washington, Oregon, and California, 

 to the San Pedro Martir Mountains, Lower California, the Santa Bar- 

 bara Islands, and (casually) Guadalupe Island; occasional straggler 

 eastward (West Humboldt Mountains, Nevada, October; Colorado, 

 winter; Racine, Wisconsin, 3 specs., fall, 1854 and 1855, spring, 1856). 



^ Seven specimens. 



^ There are two alleged breeding records for California, but these are both almost cer- 

 tainly erroneous, and belong probably to Z. Uucoplirys nutlaUi. They are: Heermann, 

 Eep. Pacific R. R. Surv., x, pt. iv, 1859, 48 (said to breed at Sacramento); Brewer, 

 Bull. Nutt. Orn. Club, iii, 1878, 42 (said to breed on McCloud River, Shasta Co.). 

 In both cases the nest and eggs supposed to be of this species are described. 



