688 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
the terminal portion dusky or blackish; iris brown; legs and feet 
black. 
Adults, dusky phase (sexes alike).—Entirely plain dark sooty 
grayish brown, the neck more or less tinged with straw yellow. 
Young, light-colored phase.—Head and neck streaked with dusky 
brown and cinnamon or cinnamon-buff, the latter usually predom- 
inating; under parts more or less distinctly barred or transversely 
spotted with the same; upper parts dusky grayish brown, the feathers 
tipped or terminally margined with cinnamon or cinnemon-huff. 
Young, dusky phase.—General color dusky grayish brown or brown- 
ish gray, the wings and tail darker; middle of neck, all round, indis- 
tinctly streaked with grayish white; under parts, except chest and 
upper breast, barred with grayish white, the bars broad and distinct 
on under tail-coverts; scapulars, interscapulars, wing-coverts, upper 
tail-coverts, and feathers of rump narrowly tipped or terminally mar- 
gined with pale dull buff. 
Downy young.—‘ Sooty brown above, paler below; but the downy 
young of dark parents are deepest in hue.’’@ 
Adult male.—Wing, 301-340 (320); tail, 164.5-235 (188.9);° ex- 
posed culmen, 28-35 (31.2); tarsus, 39.5-45.5 (41.9); middle toe, 
33-37 (84.8).° 
Adult female.—Wing, 317-341 (323.7); tail, 176-226 (199.7); 
exposed culmen, 29-34.5 (31.8); tarsus, 39-45 (42.1); middle toe, 
32-38 (35.9).¢ 
@ Saunders, Cat, Birds Brit. Mus., xxv, 1896, 332. 
5 Measured to tips of elongated middle rectrices. 
¢ Sixteen specimens. 
@ Fourteen specimens, 
Ex- . 
Locality. Wing. | Tail. | posed | Tarsus. Middle 
culmen senor 
a 
MALES. 
One adult male from northern Russia (Archangel)........-..-- 330 213 32 41.5 36 
One adult male from Iceland...........2.... eee see e eee eee eee 317 194 29 42 33 
One adult male from Greenland...-....-.-..22--.-0.+-02-eceees 319 195.5 31 40.5 34 
Four adult males from Massachusetts (September)............- 315.5 | 175.7 31.1 41.6 34.5 
Six adult males from Alaska.........-...-...-. sid odisielorenyaiatinesacreia 327 203. 6 31.7 42. 8 35.7 ° 
Three adults males from Bering Island, Kamchatka........... 313.7 | 198.3 30. 8 40. 8 34 
" PEMALES, 
One adult female from Spitzbergen..............2.2..-22-00000- 342 209.5 32 42 35.5 
One adult female from Faroes.... 2.22.22... .eceee ee eee eee eens 318 193.5 31 40. 36 
One adult female from Greenland..............---..2--00--00-- 326 206 31.5 39 35 
Two adult females {rom Massachusetts (September).........-. 329 186.3 32.5 41.5 36.5 
Eight adult females from Alaska...............02220--ceeeeceee 322 204. 2 31.8 42.9 |° 35.8 
One adult female from Bering Island, Kamchatka............. 318 200 31 40 34.5 
