73 
Genus Callocephalon. 
Of this form only a single species is known. 
375. Callocephalon galeatum ....... Vol. V. PL 14. 
Inhabits the southern coast of Australia and Van Diemen’s Land. 
Genus Polytelis. 
This genus comprises two species, both of which are peculiar to 
the southern portions of Australia. They have many characters 
common to, and resemble in appearance the Palceorni of India. 
376. Polytelis Barrabandi Vol. V. PI. 15. 
377* Polytelis melanura Vol. V. PI. 16. 
Genus Aprosmictus. 
Generic characters. 
As in Platycercus , but the bill more feeble; cere and nostrils co- 
vered with fine hair-like feathers ; wings longer and less concave ; 
tail more square ; tarsi shorter and toes longer than in that genus. 
Two, if not three species of this form inhabit Australia, and others 
are found in New Guinea and the neighbouring islands. They are 
distinguished from the Platycerci by the possession of a well-deve- 
loped os furcatorium , a bone which is entirely wanting in the mem- 
bers of that genus ; in their habits they are mainly arboreal, and in 
their disposition are morose and sullen. 
378. Aprosmictus scapulatus Vol. V. Pi. 17. 
This species appears to be confined to New South Wales. 
379. Aprosmictus erythropterus Vol. V. PL 18. 
The red-winged Parrakeets from the north coast are nearly a 
third smaller than those inhabiting the Liverpool plains and similar 
districts of the south coast ; are they varieties of each other or di- 
stinct species ? 
Genus Platycercus. 
In my opinion the New Zealand birds that have been placed in 
this genus are not true Platycerci , all the known species of which 
are confined to Australia ; they comprise fourteen species which 
appear to be naturally divisible into minor groups, to which generic 
appellations may hereafter be given ,* for instance the P. semitor- 
quatus , P. Baueri, and P. Barnardi form one ; the P. Adelaidice , 
P. Pennantii , P.Jlaveolus, and P. jlaviventris form another, and 
are the types of the genus Platycercus ; P. eximius, P. splendidus , 
and P. icterotis form a third ; and P. pileatus a fourth. 
The members of this and the two next genera lay from seven to 
ten eggs in the holes of trees. 
380. Platycercus semitorquatus Vol. V. PL 19. 
381. Platycercus Baueri Vol. V. PL 20. 
