■2-A. Campbell, Dichotomons Key. 



Outer wing coverts blue, middle verditer blue, inner olive-green like 

 back. TV. elegans (Grass- Parrakeet). 



305. Colour grass-green, barred, striped, or spotted ; tail with cross 



bands or bright green . . . . . . . . 306 



Feathers of back bordered with lighter colour, having scale-like 

 appearance ; bill notched where lower mandible touches 

 upper ; always with large, conspicuously coloured cheek- 

 patches. Platycercus. 308 



306. Total length about 12 inches . . . . . . . . 307 



Total length 7.5 inches. 



Melopsittacus undulatits (Warbling Grass-Parrakeet). 



307. Abdomen banded ; tail y.y inches. , 



Pezoporus formosiis (Ground-Parrakeet). 

 Abdomen uniform yellow ; tail 4 inches. 



Geopsittacus occidentalis (Night-Parrakeet). 



308. Cheeks blue or white and blue . . . . . . . . 309 



Cheeks white or yellow . . . . . . . . . . 317 



30Q. Cheeks blue . . . . . . . . . . . . 310 



Cheeks white and blue ; under tail coverts red . . . . 314 



310. Under parts red (or greenish with under tail coverts red, when 



immature, also back imperfect) . . . . . . 311 



Under parts yellow (whole plumage dusky green when immature, 



except blue cheeks and red frontal band) . . . . 313 



311. Under parts deep crimson .. .. .. .. ..312 



Under parts pale red, feathers fringed with yellow ; wing 6.5 inches. 



P. adelaidce (Adelaide Parrakeet). 



312. Total length 13.5 inches ; wing 6.7 inches. 



P. elegans (Crimson Parrakeet). 

 Total length 12 inches ; wing 6.3 inches ; under parts very dark. 



P. nigrescens (Campbell Parrakeet). 



313. Under parts pale yellow ; centre tail feathers dull blue. 



P. flaveolus (Yellow Parrakeet). 

 Under parts jonquil-yellow ; centre tail feathers olive-green. 

 (Mature bird with under tail coverts orange.) 



P. flavivcntris (Green Parrakeet). 



314. Head red or crown black . . . . . . . . . . 315 



Head pale yellow ; under parts blue . . . . . . . . 316 



315. Head red. P. erythropeplus (Red-backed Rosella). 

 Crown black. P. browni (Smutty Parrakeet). 



316. Feathers of back edged straw-yellow ; upper half of cheeks white. 



P. amathusia (Blue-cheeked Parrakeet). 

 Feathers of back edged bright yellow ; cheeks sometimes all white. 



P. pallidiceps (Pale-headed Parrakeet). 



317. Cheeks white ; head red (if head yellow, see No. 316) . . . . 318 

 Cheeks yellow . . . . . . . . . . . . 319 



318. Feathers of back edged yellowish-green. P. eximius (Rosella). 

 Feathers of back edged gamboge-yellow. 



P. splendidus (Yellow-mantled Parrakeet). 



319. Rump green ; centre tail feathers green ; total length 10.5 inches. 



P. icterotis (Yellow-cheeked Parrakeet). 



