298 



BONASA. HEATHCOCK, 

 Generic Character, 



Rostrum breve, basi plumo- 

 sum, supra convexum, ver- 

 sus apicem incurvatum. 



Nares basales, plumulis ob- 

 tcct^. 



CoUum utrinque pennis plu- 

 rimis elongatis, alulam si- 

 mulantibus, instructum. 



Pedes tetradactyli mutici ; 

 tarsi liirsuti. 



Cauda rotundata. 



Al(Z breves, rotimdatae. 



Beak short, feathered at the 

 base, above convex ; to^ 

 wards the tip bent down. 



Nostrils basal, covered with 

 feathers. 



Neck furnished on each side 

 with many feathers, re^ 

 sembhng a wing. 



jFV^^four-toedjSpurless; tarsi 

 hairy. 



Tail rounded. 



Wings short and rounded. 



Attagen. Briss, 



Tetrao. Luin.^ Gmcl., Lath, 3 Tern., Vieil, 

 Bo NASA. Briss. 



1 HE birds of this genus are distinguished from 

 those of the preceding in having the feathers of 

 the neck elevated on each side like a mantle : 

 their legs are only feathered to the toes, the latter 

 being naked and scaly. Two species only are 

 knov/n, both of which are natives oi' America, 



