Head brownish grey, with an indistinct line of brown down the centre of each feather; back of the neck, back and shoulders olive-brown; wings slaty black margined with grey; rump and tail grey, the latter with dark brown shafts; under surface light brownish grey, fading into pure white on the vent and under tail-coverts and greyish white on the throat, each of the throat and breast feathers with a fine line of brown down the centre; irides dark brown; bill blackish brown; feet dark greenish grey. The Plate represents a male and a female on a nest, all of the natural size. [Illustration: COLLURICINCLA RUFIVENTRIS: _Gould_. _J. Gould and H. C. Richter del et lith._ _Hullmandel & Walton Imp._ ] COLLURICINCLA RUFIVENTRIS, _Gould_. Buff-bellied Colluricincla. _Colluricincla rufiventris_, Gould in Proc. of Zool. Soc., Part VIII. p. 164. _Goö-dee-lung_, Aborigines of Western Australia. _Thrush_, of the Colonists. This species is about the size of the _Colluricincla harmonica_, for which at a first glance it might be mistaken, but from which on comparison it will be found to differ in the following particulars:—the whole of the upper surface is pure grey instead of brown; the abdomen and under tail-coverts are deep buff instead of greyish white; and the lores are much more distinctly marked with white. It is a native of Western Australia, where it is to be found in all thickly wooded places, feeding as much on the ground as among the trees and scrubs. In its actions, the positions it assumes, and in its general manners, it very closely resembles the Common Thrush of Europe. Its voice is a very loud, full and rich swelling note with a few connecting sounds, the whole much resembling, but not equalling in melody, the call-note of the European Thrush. It breeds in the latter part of September and the beginning of October, and the nest, which is generally placed in the hollow part of a high tree, is formed of dried strips of gum-tree bark very closely packed and deep, and is sometimes lined with soft grasses. The eggs, which are two or three in number, are of a beautiful bluish or pearly white, with large blotches of reddish olive-brown and dark grey, the latter appearing as if beneath the surface of the shell; the medium length of the eggs is one inch and one line by ten lines in breadth. Mr. Gilbert mentions that upon two occasions he found the eggs of this bird in old nests of _Pomatorhinus superciliosus_. The stomach is muscular, and the food consists of insects, principally of the coleopterous order, and seeds.