King’s generic term _Mimetes_ must sink into a synonym of _Oriolus_. The true and probably the restricted habitat of this species is New South Wales, where in the months of summer it is tolerably plentiful in every part of the colony. I frequently observed it in the Botanic Garden at Sydney, and in all the gardens of the settlers where there were trees of sufficient size to afford it shelter; the brushes of the country, the sides of brooks and all similar situations are equally inhabited by it. I did not find it in South Australia, neither has it been observed to the westward of that part of the country. That its range extends pretty far to the northward I have no doubt, as its numbers rather increased than diminished in the neighbourhood of the rivers Peel and Namoi; and many persons would, I feel assured, assign to it a much more extended range by considering it identical with the bird of the same form found at Port Essington,—an opinion in which I cannot myself coincide, believing as I do that the latter bird is a distinct species, although at a hasty glance it would appear to be one and the same; the general colouring of the two birds is, it is true, very similar, but the following differences exist and are found to be constant:—The Port Essington bird (for which the specific term _affinis_ would be an appropriate appellation) is smaller in the body, has a shorter wing, a much larger bill, and the white spots at the tip of the lateral tail-feathers considerably smaller than the bird inhabiting New South Wales; in other respects they are so precisely alike that it will not be necessary to figure both. The following notes descriptive of their habits and economy are equally applicable to the one and the other. The bird observed by me in New South Wales was bold and active, and was often seen in company with the Regent, Satin and Cat Birds, feeding in the same trees and on similar berries and fruits, particularly the small wild fig. It possesses a loud pleasing whistling note, which is poured forth while the bird is perched on a lofty branch. I often observed it capturing insects on the wing and flying very high, frequently above the tops of the loftiest trees. Mr. Gilbert states that the Port Essington bird is “abundant in every part of the peninsula and the adjacent islands in every possible variety of situation.” Its native name is _Mur-re-a-̏rwoo_. It possesses a very loud and distinct note, unlike that of every other bird I have yet heard; the sound most commonly uttered is a loud clear whistle terminating in a singular guttural harsh catch, but in the cool of the evening, when perched on and sheltered in the thick foliage of one of the topmost branches of a _Eucalyptus_, it pours forth a regular succession of very pleasing notes.