150 KEY TO THE BIRDS OF EASTERN NORTH AMERICA, 
Group 2. Wing, more than 5 inches long. 
Section 1. The following species do not have the greater 
portion of the primaries white. 
A tuft of black feathers on sides of the neck; tarsus not entirely feathered ; 
axillary plumes, white barred with brown. 
Ruffed Grouse ‘‘ Partridge,’’ 
Bonasa umbellus, and races. 
See No. 238. 
Tarsus, entirely feathered; axillary plumes, entirely white; no elongated 
tufts of feathers on sides of neck; tail, pointed. 
Prairie Sharp-tailed Grouse. 
Pediocetes phadianellus campestris. 
see No. 247. 
Tarsus, entirely feathered; axillary plumes, white; sometimes with faint bars 
near tip; « iuft of ten or more elongated feathers on each side of the neck; 
tail, not pointed; the ends of the neck plumes are not pointed, and the axillary 
plumes are very rarely barred on the whole feather, as in the Martha’s Vineyard 
species. } 
Prairie Hen. Pinnated Grouse. 
Tympanuchus americanus. 
See No. 245. 
