The young are destitute of the black on the throat, and of the blue line beneath the eye. The figures are of the natural size. [Illustration: EURYSTOMUS AUSTRALIS: _Swains._ _J. Gould and H. C. Richter del et lith._ _C. Hullmandel Imp._ ] EURYSTOMUS AUSTRALIS, _Swains_. Australian Roller. _Eurystomus orientalis_, Vig. and Horsf. in Linn. Trans., vol. xv. p. 202. _Eurystomus Australis_, Swains. Anim. in Menag., p. 326.—Ib. Class. of Birds, vol. ii. p. 333. _Coracias pacifica_, Lath. Ind. Orn. Supp., p. xxvii? _Pacific Roller_, Lath. Gen. Syn. Supp., vol. ii. p. 371? _Natay-kin_, Aborigines of New South Wales. _Dollar Bird_ of the Colonists. By the older writers this species was considered to be identical with the _Eurystomus orientalis_, and the merit of first pointing out its distinguishing characters is due to Mr. Swainson, who observes that it is “smaller than _E. orientalis_; has the bill less compressed, and therefore much broader; the colours lighter, but the wings much bluer; the spurious wings entirely vivid blue, as well as the outer webs of the quills; while in _orientalis_ these parts are almost black.” It is a very local species, as I have never seen it from or met with it in any other part of Australia excepting in New South Wales, and even there it is migratory, arriving early in the spring; having brought forth its progeny, it retires northwards on the approach of winter. From what I saw of it,—and I had opportunities of observing it almost daily for some length of time,—it seemed to be most active about sun-rise and sunset, and during cloudy days; in sultry weather it was generally perched upon some dead branch in a state of quietude. It is a very bold bird at all times, but particularly so during the breeding-season, when it comes down with the utmost fury upon any intruder that may venture to approach the hole in the tree in which its eggs are deposited. When engaged in the capture of insects it usually perches upon the dead upright branch of a tree growing beside and overhanging water, where it sits very erect, soaring all around until a passing insect attracts its notice, when it suddenly darts off, secures its victim, and returns to the same branch; at other times it may constantly be seen on the wing, mostly in pairs, flying just above the tops of the trees, diving and rising again with rapid turns in the most beautiful manner. During flight, which, when performed at a considerable elevation, is heavy and laboured, the white spot in the centre of each wing, then widely expanded, shows very distinctly, and hence the name of Dollar Bird bestowed upon it by the colonists. It is a very noisy bird, particularly in dull weather, when it often emits its peculiar chattering note during flight.