It breeds in September and October. The nest is a beautiful, compact, round, cup-shaped structure, about three inches in diameter and an inch and a half deep, composed of narrow strips of bark, wiry fibrous roots, and in some instances grasses; the outside held together with cobwebs, and sparingly speckled over with mouse-eared lichen and small pieces of bark, hanging loosely about it; the inside of the nest is generally lined with leaves, but occasionally with portions of the broad blades of grasses. It is generally placed in the fork of some low tree in an open or exposed part of the brush, is a neat structure, and sometimes so nearly resembles the bark of the tree upon which it is constructed, that it is almost impossible to detect it, so extraordinary is the instinctive power of imitation with which the bird has been endowed. The eggs are usually two in number, of a bright apple-green, speckled and spotted all over with chestnut-brown and blackish brown, the latter tint being much less conspicuous than the former; they are nine lines long by seven and a half lines broad. It is not migratory, and so far as is known, is confined to the southern and eastern portion of the country. The sexes are alike in colour, but the female is somewhat smaller in size: the young on leaving the nest has the plumage streaked and spotted very similar to that of young Robins, but obtains the plumage of the adult at an early period. Head and all the upper surface, wings and tail, with the exception of the rump, very dark grey; chin white; all the under surface and rump wax-yellow; irides, bill and feet black. The figures are of the natural size. [Illustration: EÖPSALTRIA GRISEOGULARIS, _Gould_. _J. Gould and H. C. Richter del et lith._ _C. Hullmandel Imp._ ] EÖPSALTRIA GRISEOGULARIS, _Gould_. Grey-breasted Robin. _Eöpsaltria griseogularis_, Gould in Proc. of Zool. Soc., Part V. p. 144; and in Syn. Birds of Australia, Part IV. _Bȁm-boore_, Aborigines of the lowland districts of Western Australia. The fact of one species representing another, as they are frequently found to do, on opposite sides of large continents, is in no instance more clearly exemplified than in the two species of the genus _Eöpsaltria_ inhabiting Australia, which, although closely allied in size, structure and colouring, as well as in habits and economy, inhabit very different countries, one being confined to the eastern, and the other to the western portion of the continent.