652 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



buff ; secondaries fuscous to chaetura black like the back and scapulars, 

 the inner webs with five or six incomplete bars of pale ochraceous-buff 

 to pinkish buff, these bars not reaching the shaft; rectrices very dark 

 hair brown to fuscous or chaetura black, crossed by five or six inter- 

 rupted bars (really a pair of transverse spots, one on each web, that 

 on the inner web usually longer and reaching the margin of the feather 

 on the inner web) of ashy vinaceous-buff, these marks ashy, not buffy, 

 and often indistinct or even wanting, on the median pair of rectrices; 

 chin and upper throat pale buffy white to warm buff; malar stripe, 

 cheeks, and auriculars as in adult; lower throat, breast, and abdomen 

 pale ochraceous-buff to cinnamon-buff, each feather with a very broad 

 median stripe of dai'k sepia to fuscous-black; feathers of the sides, 

 flanks, and thighs with the dark shaft stripes and with two bars and 

 a subterminal wedge-shaped spot of the same; under tail coverts 

 pale ochraceous-buff to dirty whitish barred with fuscous; under wing 

 coverts very pale pinkish buff to pale cinnamon-buff heavily spotted 

 and barred with fuscous-black; iris dark brown; bare orbits and cere 

 livid bluish; bill bluish, darker at tip; tarsi and toes pale bluish, 

 claws black. 



Juvenal female. — Like the juvenal male, but the forehead, crown, 

 occiput, and nape feathers edged with tawny to ochraceous-buff; the 

 margins of the feathers of the upperparts slightly more ferruginous; 

 the entire underparts more heavily washed with cinnamon. 



Natal down. — Pure white, sometimes with a faint creamy or car- 

 tridge buff cast. 



Adult male.— Wing 301-327 (314.2); tail 138-154 (145.1); culmen 

 from cere 18-21 (19.6); tarsus 46-54 (50.6); middle toe without claw 

 45-52 (47.5 mm.).« 



Adult female. —Wing 340-376 (356.3); tail 167-192 (178.9); culmen 

 from cere 20-25 (23.4); tarsus 50-57 (54.4); middle toe without claw 

 50-60 (53.9 mm.).''2 



Range. — Breeds from northern Alaska (Point Barrow, Point Martin, 

 Icy Cape, Sand Point, Nulato, Fort Yukon, Admualty Islands (?)); 

 northern Mackenzie (above lat. 58° N. on Mackenzie River); North- 

 west Territories (Hudson Bay, Southampton Island; Chesterfield); 

 Ungava (Fort Chimo); Somerset Island; Baffin Island; west-central 

 Greenland (Godthaab, Angmagsalik, Holsteinberg) ; Labrador and 

 Newfoundland Labrador (Doane, Pamiarluk, Okkak, Cape Chidley, 

 Nain; Makkovik, Davis Strait); Newfoundland; New Brunswick; 

 and Nova Scotia; south throughout Alaska (except the Aleutian 



■*' Twenty specimens from western Greenland, New York, New Jersey, Alberta, 

 Alaska, and one from Jamaica. 



<2 Twenty-two specimens from Alaska, Alberta, Ungava, Montana, New York, 

 New Jersey, Georgia, and Mexico. 



