FAMILY TETRAONID.Z. — GROUSE, PARTRIDGES, QUAILS, ETC. 153 
Depth of bill at base, .40 or more; no black on lores; shafts of secondaries, 
black. Newfoundland. 
Allen’s Ptarmigan. 
Lagopus lagopus alleni. 
See No. 241. 
Depth of billat base, less than .40. 
In summer: back, gray, mixed 
with black, or tawny buff, or 
gray and white. Jn winter: 
plumage, white; lores, usually 
(not always) black. 
Rock Ptarmigan. 
Lagopus rupestris, and races. 
See No. 242. 
Similar to Lagopus rupestris, but in summer, back, more heavily barred. Confined 
to Northern Labrador and Greenland. 
Reinhardt’s Ptarmigan. 
Lagopus rupestris reinhardti. 
See No. 243. 
Depth of bill at base, less than .40; shafts of secondaries, not black. Confined 
to island of Newfoundland. 
Welch’s Ptarmigan. 
Lagopus welchi. 
See No. 244. 
