ROCK PTARMIGAN. 153 
EAGOR US ROPEST RES. 
Geographical Distribution.—Arctic America, Alaska to Labra- 
dor, south to Gulf of St. Lawrence, Greenland. 
Adult Male tn Summer.—Head, neck, and upper parts, gray, 
barred with black, and irregular rusty bars on the head, back of 
neck, upper back and scapulars, and black blotches on upper 
part of back; wings, like the back; primaries and outer second- 
aries, white, with brownish black shafts on the primaries; upper 
tail-coverts, gray, barred with black, and occasionally rusty, some 
feathers with white tips; tail, blackish brown, lighter on margins; 
breast, dark brown, feathers barred with white and black; entire 
rest of under parts and legs, pure white; lores, black; bill, black. 
Total length, 14 inches; wing, 74; tail, 44. Specimen from 
Labrador. 
Adult Female tn Summer.—Shot July 31. Head, entire upper 
parts, and wings, black, irregularly barred with white and deep 
buff, feathers generally tipped with white, broadest on upper 
tail-coverts, many of which have their outer margins deep buff; 
tail, smoky-brown, tipped with white; throat, breast, and flanks, 
ochraceous, barred with black, some white feathers showing; 
middle of abdomen, white; crissum and under tail-coverts, och- 
raceous, barred with black; feathers on thighs and legs, white; 
primaries, white, with pale brown shafts; secondaries and most 
of the wing-coverts, also white; bill, black. Total length, about 
13 inches; wing, 7; tail, 44. Specimen from Quickiock Falls, 
Labrador. 
