BIRDS OF NORTH AND MIDDLE AMERICA. Ill 



/. Maxilla not swollen laterally, little wider than deep at base, compressed 

 toward the broadly flattened culmen, subpjTamidal or truncate-sub- 

 conical in tran verse section, its tip neither attenuated, acute, nor 

 ridged; cere feathered behind nostrils; rectrices without any red. 

 g. Tail not longer than wing (usually decidedly shorter), graduated for 

 not more (usually less) than half its length; depth of bill much 

 greater than length of culmen, the maxillary unguis much shorter and 

 thicker, more strongly deciurved; pileum green, blue, yellow, or red, 

 h. Tip of mandible less produced, strongly rounded (transversely), the 

 obtuse edge deeply concave above; under sm-facc of remiges and 

 rectrices olive-yellowish; no blue on remiges.. . .Aratinga(p. 150). 

 hh. Tip of mandible more produced (more chisel-like), flattened, the 

 more acute terminal edge straight or very slightly concave above; 

 under surace of remiges and rectrices blackish or slaty; distal 

 secondaries and distal portion of proximal primai-ies deep blue. 



Eupsittula (p. 161). 



gg. Tail longer than wing, graduated for more than half its length; depth 



of bill at base equal to less than length of culmen, the maxillary 



unguis relatively long, narrow, and slightly decurved; pileum 



]3lack Nandayus (extralimital).a 



ee. Seventh primary not attenuated terminally. 

 /. Culmen flattened (at least basally, where sometimes grooved medially); 

 tenth (outermost) primary shorter than seventh; orbital region more 

 extensively naked; tail brownish red or blackish brown, at least on 

 under surface; orbital ring of skull complete &; ambiens muscle 

 wanting. ^ 

 g. Upper portion of cere less produced, less extensively naked; tail 

 longer than wing; chisel-like tip of mandible flat, its width equal 

 to only one-third the length of gonys; auricular feathers narrow, 

 elongated, yellow, forming a conspicuous tuft. 



Leptosittaca (extralimital).c 

 99- Upper portion of cere much produced, more extensively naked; tail 

 not longer (usually shorter) than wing; chisel-Uke tip of mandible 

 ' strongly rounded (transversely), its width much more than one- 

 third the length of gonys; auricular feathers normal, never yellow. 



Pyrrhura (p. 175). 

 /. Culmen not flattened; tenth (outermost) primary much longer than 

 seventh; tail green (no red in plumage); orbital ring complete; 

 ambiens muscle present. 



o Nandayus Bonaparte, Rev. et Mag. de Zool., (2) vi, 1854, 150. (Type, Psittacus 

 nenday Vieillot.) 



Paraguay . ( Monotypic . ) 



& At least in Pyrrhura; not known as to Leptosittaca. 



c Leptosittaca Berlepsch and Stolzmann, Ibis, 6th ser., vi, July, 1894, 402. (Type, 

 L. hranichii Berlepsch and Stolzmann.) 



Central Peru. (Monotypic.) 



This genus presents a rather close superficial resemblance to Ognorhynchus, especially 

 in the narrow and elongate yellow auricular feathers, but the bill is very differently 

 shaped, and the cheeks, instead of showing a very large naked area next to the base 

 of the mandible are covered with rather large feathers which completely hide the 

 very narrow bare post-mandibular space and even overlap the base of the mandible 

 itself. 



