This elegant species of _Platycercus_, which, up to the present time, has been more frequently seen alive in a state of captivity than preserved in our zoological collections, is a native of the eastern coast of Australia, and is tolerably numerous at Moreton Bay, where all the specimens I have seen were procured. It is known in Sydney by the name of Moreton Bay Rose-hill, an appellation bestowed on it from its near alliance to the _Platycercus eximius_. The specific name of _palliceps_ has been applied to this species from the light colouring of the head, which amounts, in some specimens, to a total absence of colour: this however, I think, may be attributed to the effects of exposure to light, since, in recently moulted birds, there is always a delicate tinge of yellow pervading the crown; the delicate blue on the cheeks also appears to be affected by the same cause, though not to so great an extent. It bears confinement remarkably well, and is very docile and familiar, which, added to its very elegant plumage, renders it a general favourite. Crown of the head and cheeks either wholly white or pale gamboge-yellow; in some specimens also there is a fine line of scarlet crossing the forehead, and the lower part of the cheeks is deep blue; feathers of the nape, back and scapularies black, broadly margined with gamboge-yellow; rump in some instances greenish blue, in others this part is strongly tinged with gamboge-yellow; primaries and secondaries blackish brown, with the base of their external webs deep blue; greater and lesser wing-coverts, and the shoulders, both above and below, beautiful blue; that part of the wing nearest the body black; all the under surface verditer-blue, with the exception of the under tail-coverts, which are scarlet; two middle tail-feathers greenish blue; the basal half of the remainder being blackish-brown on their internal webs, rich deep blue on their outer webs, and the terminal half delicate pale blue, passing into white at the tip; bill horn-colour; irides blackish brown; feet dark mealy brown. The sexes differ in no respect in outward appearance, with the exception of a slight superiority of size in the male. The Plate represents a male and a female of the natural size. [Illustration: PLATYCERCUS EXIMIUS. _J. Gould and H.C. Richter del et lith._ _Hullmandel & Walton Imp._ ] PLATYCERCUS EXIMIUS, _Vig. and Horsf._ Rose-hill Parrakeet. _Psittacus eximius_, Shaw, Nat. Misc., pl. 96.—Ib. Zool. of New Holl., t. 1.—Kuhl, Consp. Psitt. in Nov. Act. &c., vol. x. p. 54. No. 87.—Lath. Ind. Orn. Suppl., p. xxi. _Perruche omnicolore_, Le Vaill., Hist. Nat. des Perr., p. 29. pl. 28. _Nonpareil Parrot_, Lath. Gen. Hist., vol. ii. p. 138. No. 41.—Id. Gen. Syn. Suppl., p. 85.—Shaw, Zool., vol. viii. p. 411. pls. 57, 58. _Platycercus eximius_, Vig. and Horsf. in Linn. Trans., vol. xv. p. 281.—Wagl. Mon. Psitt. in Abhand. &c., p. 530.