298 Tenth Supplement to the A. O. U. Check- List. \^% 



Geog. Dist.— Arctic America, from the Mackenzie River east- 

 ward, southward in migration, chiefly coastwise, to Patagonia and 

 the Falkland Islands, 



The range of A. mterpres thus becomes restricted to the Old 

 World, Greenland, and western Alaska. 



[B ^60, part, C T,8o,part, R 472, /<zr/, C 5 5 5 , /<?■''/•] 

 298^;. Canachites canadensis labradorius Bangs. 



Labrador Spruce Grouse. 



Canachites canadensis labradorius Bangs, Proc. N. EngL 

 Zool. Club, I, 1899, 31. 



[B 46o/<7r/, C 380/^?;-/, R ^-j 2 part, C SSSP^^^-] 



Geog. Dist. — Labrador. 



298/^. Canachites canadensis osgoodi Bishop. 

 Alaska Spruce Grouse. 



Canachites catiadensis osgoodi Bishop, Auk, XVII, April,. 



1900, 1 14. 



[B— ,C— , R— ,C— .] 



Geog. Dist. — Upper Yukon region and thence northwest to 

 Prince William Sound and Cook Inlet. 



304rt'. Lagopus leucurus altipetens Osgood. 

 Southern White tailed Ptarmigan. 



Lagopus leucurus altipetens Osgood, Auk, XVIII, April,. 



1901, 180. 



[B ^6<^ part, C 388 part, R 4.^6 part, C ^jopart.] 



Geog. Dist. — Southern Rocky Mountains (Colorado, New 

 Mexico, etc.). 



Lagopus leucurus is the northern form, occurring in the 

 Northwest Territory, Alaska, etc. 



