480 Annals of the Carnegie Museum. 



//. Size medium or small (wing not more than 250). 



a. Tail square or very slightly rounded, not pointed, the difference between 

 shortest and longest rectrix never greater than longest claw (usually 

 less. 

 b. Color above and below chiefly light apple-green, never any blue on under 

 parts or on shoulder. 

 c. Size large (wing not less than 185) ; no blue on crown or else fore- 

 head bright crimson. 

 d. Feathers of crown and nape broadly tipped with light blue or 

 bluish-lilac, nape feathers edged with blackish ; forehead 

 crimson. 

 e. A yellow spot below eye, less lilac on nape, little or no 

 red on base of inner web of outer rectrix. 



Amazona autumnalis autumnalis, $ , 9 ■ 

 ee. No yellow on side of head, more lilac on nape, and red 

 spot on tail prominent (concealed by coverts). 



Amazona autumnalis salvini, $ , 9 . 



dd. No blue on crown, forehead concolorous with crown, or very 



slightly bluish. 



e. Broad band of yellow across nape ; no bluish tinge on 



forehead. Amazona auropalliata, g , 9 • 



ee. No yellow on nape ; feathers tipped with bluish-lilac and 



edged with dusky ; forehead slightly bluish. 



Amazona virenticeps, $ , 9 



cc. Size smaller (wing not more than 165) ; crown deep indigo-blue 



forehead white, lores and narrow ring around eye crimson 



feathers of nape and interscapular region edged with black 



d. All of the outer wing-coverts bright crimson. 



Amazona albifrons, $ 

 dd. No crimson on wing. Amazona albifrons, 9 



bb. Some part of the body conspicuously blue, or else shoulder blue ; sides 

 scarlet and other primaries edged with yellow toward tips. 

 c. Forehead and crown pure white ; nape, sides of head, and lower 

 parts blue or greenish-blue; center of throat white; wing- 

 coverts spotted with bronzy brown. Pionus senilis, $ , 9 • 

 cc. No white on crown. 



d. Whole head, throat, and chest bright blue ; under tail-coverts 



red ; jugulum slightly reddish. Pionus menstruus, $ , 9 • 



dd. Crown brownish-gray, nape and chest golden-olive, throat 



dusky ; shoulders deep blue ; sides bright crimson, no red 



on under tail-coverts. Pionopsittacuz h&matotis, $, 9* 



aa. Tail markedly pointed, central rectrices exceeding outer by at least length 



of culmen (usually much more). 



b. Forehead bright crimson, or else dull salmon-red. 



c. Size large (wing, 160); inner wing-coverts scarlet; no blue on 



wing. Conurus Jinschi, g, 9- 



cc. Size small (wing, 130); fore-crown bluish-green; inner wing- 



