Forehead, cheeks, sides of the neck and breast delicate grey; occiput, back, wing-coverts, rump and upper tail-coverts silky brown; back of the neck rufous, every feather of the upper surface bounded at the extremity with a narrow band of black, giving the whole a squamated or scaled appearance; under surface of the shoulder and the inner webs, except their tips, of the primaries and secondaries fine rust-red; outer webs and tips of the inner webs of the primaries and secondaries brown; two centre tail-feathers dark grey, the remainder reddish brown at the base, gradually increasing in intensity towards their tips, those next the centre ones washed with grey on their outer webs, and all but the centre ones largely tipped with white; centre of the abdomen white; the remainder of the under surface washed with vinous; irides ochre-yellow; bill and nostrils delicate mealy light blue; naked skin round the eye mealy purple; legs and feet pink red. The Plate represents a male and female of the natural size. [Illustration: GEOPELIA TRANQUILLA: _Gould_. _J. Gould and H.C. Richter del et lith._ _Hullmandel & Walton Imp._ ] GEOPELIA TRANQUILLA, _Gould_. Peaceful Dove. _Geopelia placida_, Gould in Proc. of Zool. Soc., Part XII. p. 56. The interior of the country northward from New South Wales is inhabited by considerable numbers of this pretty little Dove, but it has not yet been met with either in Southern or Western Australia. It was very abundant on the Namoi, particularly on the lower part of that river; and that its range will extend over a large part of the interior, is more than probable. A bird precisely similar in markings, but of a smaller size, is very abundant at Port Essington, and the two birds may prove to be mere varieties of each other; at the same time, as so great a variation in size rarely if ever occurs in a state of nature, I have for the present considered it to be a distinct species, and assigned to it the name of _Geopelia placida_; it is nearly one-third less than the bird here represented, but as there is not the slightest difference in the markings, it will not be necessary for me to give a figure of it. The bird found in the neighbourhood of the Lower Namoi was chiefly observed on the ground, feeding on the seeds of the various kinds of plants that grow under the shelter of the thinly-timbered forests bordering the plains. It was frequently seen in flocks, and was equally as tame as the _Geopelia cuneata_.