152 



KEY TO THE 151KDS OF EASTERN NORTH AMERICA. 



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Tarsu?, entirely feathered; 

 axillary plumes, smoky 

 gray with white shafts, 

 and tipped with white; 

 the male has the breast 

 black ; the female has the 

 breast tawny brown, black, 

 and white. 



Canada Grouse. 



Spruce Partridge. 



Dcndrariapns cnnadcusi.- 

 See No. 237. 



Section 2. The following species have the greater portion 

 of the primaries white. 



M: 



.^^^^^^gWM-^:^-^ ^— 



Depth of bill at base, .40 or more ; no black on lores ; shafts of secondaries, not 

 black. 



Willow Ptarmigan. 



Lagopus lagopus. 

 See No. 240. 



