OF THE GENUS TETRAO. 389 



TETRAO. 



I. BONASIA. 



Tetrao, Vieill. Cogs de bruyeres, Cuv. Banana. Stephens. 



Lower portion of the tarsus, and toes, naked. Not varying 

 much with the seasons. Crested and ruffed; tail elongated 

 and rounded: female similar to the male; flesh tight coloured. 



Dwell in dense forests composed of differed! kinds of trees. 



1. Tetrao bona.sia. L. 



.Mottled: tail composed of sixteen mottled feathers, the la- 

 teral gray, with a broad black subterminal band. 



Male; sides of the neck with a ruff of small feathers; uni- 

 form with the rest; throat black. 



Female and young: ruff smaller, throat white. 



Hazel Grouse, Lath. La Gelinotte, Buff. pi. enl. 474, 

 male: 475. female. 



Inhabits wooded mountains in the central parts of the old 

 continent: rather common in several districts of eastern Ger- 

 many. 



2. Tetrao umbelhu, L. 



.Mottled: tail of eighteen mottled feathers, all ferruginous, 

 and with a black subterminal band. 



Male: a ruff of large black leathers on the sides of the neck: 

 throat white. 



Female and young; ruff smaller, dark brown. 



Buffed Grouse, Wils. Am. Orn. vi. pi. 4f). male. 



Inhabits North America; common, especially in moun- 

 tainous pine districts. 



