68 AVES. 



Subgenus Ara. Maccmo. 



Tail displayed and long ; cheeks without feathers. [Ame- 

 rica.] 



Subgenus Paroquet. 



Tail long; cheeks feathered ; a naked space around the eye. 



Subgenus Cockatoo. 



Tail short, equal or squared ; cheeks feathered ; a movable 

 crest. 



Subgenus Paroquet Proper. 



Tail equally cuneiform ; no crest. 



Subgenus Trumpet Paroquet. 



Tail short and square ; a crest ; cheeks denuded ; upper 

 beak enormous. 



ORDER IV. GALLINACEvE. 



Upper mandible arched ; nostrils pierced in a large mem- 

 branous space at the base of the beak, and covered by a car- 

 tilaginous scale ; a heavy carriage ; short wings ; the bony 

 sternum diminished by two emarginations so wide and deep 

 that they occupy nearly the whole sides ; fourchette articu- 

 lated by a simple ligament ; flight feeble ; anterior toes 

 united at base by a short membrane, and indented throughout. 

 The Pigeons and another genus are the only kind which have 

 not this membrane ; their usual food is grain ; crop extremely 

 large, and gizzard vigorous. 



Genus Pavo, Lin. Peacock. 



An aigrette or crest on the head ; beak naked at its base ; 

 the coverts of the tail of the males more elongated than the 

 quills, and capable of being erected so as to form a wheel. 

 The domestic Peacock is a native of India, and was brought 

 thence by Alexander. 



Genus Alector, Merr. Hocco. 



Beak robust, with the upper mandible the longest, bent, 

 and surrounded with a skin where the nostrils are pierced ; 

 head crested ; no spur. 



