The sexes present the usual difference in size, but in colour and markings they closely assimilate. All the upper surface grey; throat and all the under surface white, crossed with numerous irregular grey bars; cere yellowish orange; feet yellow; bill and claws black. The irides of the young are brown. The figures represent the two sexes of the natural size, the smaller bird being the male. [Illustration: ASTUR NOVÆ-HOLLANDIÆ. _White Variety?_ _J. Gould and H. C. Richter del et lith._ _C. Hullmandel Imp._ ] ASTUR NOVÆ-HOLLANDIÆ, _Vig. and Horsf., Albino_ White Goshawk. _Lacteous Eagle_, Lath. Gen. Hist., vol. i. p. 216. _Astur Novæ-Hollandiæ_, Vig. and Horsf. in Linn. Trans., vol. xv. p. 179.—Gould in Syn. of Birds of Australia, Part III. _Astur albus_, Jard. and Selb. Ill. Orn., vol. i. pl. 1. _Falco Novæ-Hollandiæ_, Lath. Ind. Orn., vol. i. p. 16.—Gmel. Syst. Nat., vol. i. p. 264.—Daud., vol. ii. p. 56. _Falco albus_, Shaw in White’s Voy., pl. in p. 260.—Ib. Gen. Zool., vol. vii. p. 92. _New Holland White Eagle_, Lath. Gen. Syn., vol. i. p. 40.—Ib. Supp., p. 12.—Ib. Gen. Hist., vol. i. p. 217.—White’s Voy., pl. in p. 260. _Goo-loo-bee_, Aborigines of New South Wales, _Latham_. _White Hawk_, of the Colonists. Although I feel convinced that the white bird to which the name _Falco Novæ-Hollandiæ_ has been constantly applied by the older writers is merely an albino of the species figured on the preceding plate, I have been induced to give a representation of it here, in order to show what synonyms have reference to that state of plumage, as well as to depict one of the most ornamental and beautiful of the _Falconidæ_ inhabiting Australia. As I have before stated, the range of the grey bird would seem to be confined to New South Wales: on the other hand, the white bird is not only found in the same districts, but is also very generally, though sparingly, distributed over Van Diemen’s Land, a fact which might induce many persons to consider it to be a distinct species; I am however inclined, with Cuvier, to believe it to be merely an albino variety, now become permanent,—an event of very rare occurrence among animals in a state of nature. The diversity in the colouring of the irides of the many individuals that have come under my notice would materially tend to confirm this opinion, some having the irides bright yellow, and others brown; a splendid female I shot under Mount Wellington in Van Diemen’s Land had the irides bright crimson, like those of the albinos of many other animals; while another equally fine female, in the possession of the Hon. Henry Elliot, at Government House, had the irides bright yellow.