298 , Tenth Supplement to the A. O. U. Check-List. [fas 
Groc. Disr.—Arctic America, from the Mackenzie River east- 
ward, southward in migration, chiefly coastwise, to Patagonia and 
the Falkland Islands. 
The range of A. zvterpres thus becomes restricted to the Old 
World, Greenland, and western Alaska. 
[B 460, part, C 380, part, R 472, part, C 555, part.| 
298a. Canachites canadensis labradorius BANcs. 
Labrador Spruce Grouse. 
Canachites canadensis labradorius BANGS, Proc. N. Engl. 
Zool. Club, I, 1899, 31. 
[B 460 part, C 380 part, R 472 part, C 555 part.| 
Geroc. Dist.—Labrador. 
2986. Canachites canadensis osgoodi Bisuop. 
Alaska Spruce Grouse. 
Canachites canadensis osgoodi BisHop, Auk, XVII, April, 
1900, I 14. 
[B—, C—, R—,C —.] 
GroGc. Dist.—Upper Yukon region and thence northwest to 
Prince William Sound and Cook Inlet. 
3042. Lagopus leucurus altipetens Oscoop. 
Southern White-tailed Ptarmigan. 
Lagopus leucurus altipetens Oscoop, Auk, XVIII, April, 
1901, 180, 
[B 469 part, C 388 part, R 476 part, C 570 part.| 
Greoc. Dist.—Southern Rocky Mountains (Colorado, New 
Mexico, etc.). 
Lagopus leucurus is the northern form, occurring in the 
Northwest Territory, Alaska, etc. 
