THE PRAIRIE CHICKEN 119 



that no one has made a success of domesticating this 

 valuable bird. 



Key to the Families of Gallinae 



CRACID.S: Curassows and Guans. 



With the hind toe inserted on the level of the anterior toes, and 



more than half as long as the lateral toe, 

 MELEAGRIDIDJJ Turkeys. 



Large, long-necked birds, with the hind toe less than half as long 



as the lateral, and inserted above the level of the rest ; legs with 



spurs, and entire head unfeathered. 

 ODONTOFHORID.K American Quails. 



Small or moderate-sized, rather short-necked birds, without spurs, 



and with the head feathered; tarsus and nostrils entirely unfeathered. 

 TETRAONID^ Grouse. 



Moderate or rather large sized birds with the taraua at least partly 



feathered, and the nostrils wholly so* 



