2G7 



Subfamily III. PIONINiE. 



Tail short and broad, square or rounded, about half tho length 

 of tho wing, longer in Tridaria and Deroptyus ; bill moderately 

 strong, sometimes longer than deep, sometimes the reverse ; culmen 

 generally with a groove ; upper mandible frequently notched and 

 always with the palatine portion of the hook furnished with a file- 

 like surface ; gonys frequently with a ridge along the middle. 

 Cere, surrounding the whole baso of the bill, swollen in front of 

 the nostrils and always naked. Wings with the second, third, and 

 fourth primaries generally the longest. Orbital ring in several 

 genera complete. General colour mostly green. 



Ruwje. Tropical America and Africa. 



Key to the Genera. 



a. No tufted oil-gland ; tail moderate or 



short. 



a. Tail moderate, rounded; under tail- 

 coverts always green ; orbital ring 

 complete 17. Chrysotis, p. 268. 



b'. Tail very short and nearly even ; under 



tail-coverts green 18. Pachynus, p. 320. 



c'. Tail moderate and nearly even ; under 

 tail-coverts always red ; orbital ring 

 complete 19. Pionus, p. 321. 



b. Oil-gland tufted. 



d". Tail rather long, more than three 

 fourths of the length of the wing; 

 bill rather short, deeper than long. 

 a". Feathers of the hind neck broad, 



very long and erectile 20. Deroptyus, p. 335. 



b". Feathers of the hind neck normal . . 21. Triclaria, p. 337. 

 e'. Tail rather short, less than half the 

 length of the wing, 

 c". Bill as deep as it is long, with 

 the under mandible longer than 

 deep. 

 «'". Tail-feathers more or less 

 acuminate, constantly with 

 blue tips; upper tail-coverts 

 reaching about the half of 

 the tail. 



«'. Head entirely feathered 22. Pion t opsittacus,p.338. 



b [ . Anterior part of the head 



naked 23. Gypopsittacus,p.349. 



b'". Tail-feathers equally broad 

 nearly to the tips, generally 

 brightly coloured and sharply 

 bordered at the tips ; upper 

 tail-coverts reaching nearlv 

 to the tip of the tail ; size 

 small 24. UiiOciiitOMA, p. 350. 



