JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 137 



Under parts, white, black, and rufous; throat, white (male); 

 throat, buff brown (female). Colinus virginianus, and races. 



Quail. Bob-white. 



See No. 140. 



* GROUP 2. Wing, more than 5 inches long. 



SECTION 1. The following species do not have the greater portion 

 of the primaries white : 



Ruffed Grouse. 



A tuft of black feathers on sides of the neck; tarsus, not entirely 

 feathered; axillary plumes, white, barred with brown. 



Bonasa umbellus, and races. 



Ruffed Grouse. "Partridge." 



See Nos. 142, i42a. 



Tarsus, entirely feathered; axillary plumes, entirely white; no 



elongated tufts of feathers on sides of neck; tail, pointed. 



Pedicecetes phasianellus campestris. 

 Prairie Sharp-tailed Grouse. 

 See No. 14$. 



Tarsus, entirely feathered; axillary plumes, white; sometimes 

 with faint bars near tip ; a tuft of ten or more elongated feathers on 

 each side of the neck; tail, not pointed. Tympanuchus americanus. 



Prairie Hen. Pinnated Grouse. 

 See No. 144. 



* For directions for measurement, see page ai. 



