CAUCASIAN SNOW PAUTEIBGE, lU 



CLASS— AVES. 

 Division II.— AUTOPHAGI. 



The young of which can more or less feed themselves from birth. 



Order X.— GALLING. 



Famihj PEEDICIDJE. {Bo7iaparte.) 



Genus Tetrao-gallus. {Gray.) 



Generic Characters. — Beak much shorter than the head, broad at its base; 

 upper mandible arched near the point, compressed, the commissure waved 

 or undulated. Nostrils pierced in a semicircle at the base of a swollen 

 cere, and surrounded by the feathers of the forehead. Wings subacute, 

 the second and third primaries being the longest; tail large and rounded. 

 Tarsi short and stubby, equal in length to the third toe, broadly shielded 

 with scales; toes united by a slight membrane; the hind toe is short, and 

 does not touch the ground; claws middle sized. 



CAUCASIAN SNOW PAETEIDGE. 



Tetrao-gallus caucasicus, 



Tetrao-gallus caucasicus, Gray. Bonaparte. Schlegel. 



" caspuis, Gray; No. 9814. 



Tetrao caucasicus, Pallas; Zoog., p. 76, No. 225. 



Tetraogalle du Caucase, Of the French. 



Kaukasisches AIpe7ihuhn, Of the Germans. 



Specific Characters. — Upper plumage grey. The feathers of the upper wing 

 coverts and middle of the back broadly bordered with ochreous brown on 

 their outer web. The long feathers of the flanks edged on both webs 

 with still darker ochreous brown. Front of the neck marked with the 

 brown horse-shoe, like the Grey Partridge. Length twenty-one inches and 

 a half; carpus to tip eleven inches; tarsus and middle toe and claw each 

 two inches and a half; beak one inch and a half long, and circumference 

 at base two inches. 



