128 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. IX. 



Family TURDID^. Thrushes, Robins, Bluebirds. 



See page 271. 



PART 2. First primary, more than half as long as third. 



Toes, four, hind toe not elevated above the rest; nostril, opening 

 into a soft fleshy membrane; tarsus, usually shorter than the toes. 



Family COLUMBIA). Pigeons and Doves. 



See page 139. 



Toes, four, the hind toe elevated above the rest; bill, rather short 

 and stout; wing, short and somewhat rounded, the outer primaries 

 curved. 



Family TETRAONID^. Grouse and Quail. 



(a) Tarsus, feathered; wing, over 5.50 inches long. 



Subfamily TETRAONIN^E. Grouse. 

 See page 136. 



