Mr. Bynoe’s specimens were all obtained during the survey of the north-west coast, a portion of Australia the natural productions of which are but little known, and Captain Grey’s during his expedition into the interior, from the same coast. In size the Silvery-crowned Friar-bird is somewhat inferior to the common species (_Tropidorhynchus corniculatus_), from which it may also he readily distinguished by the crown of the head being clothed with well-defined, small, lanceolate feathers. Of its habits and economy nothing is known; but as it is very nearly allied to the last-mentioned species, we may reasonably conclude that they are very similar. Crown of the head silvery grey; the remainder of the head naked, and of a blackish brown; throat and all the under surface white; back, wings and tail brown; bill and feet blackish brown. The figure is of the natural size. [Illustration: TROPIDORHYNCHUS CITREOGULARIS: _Gould_. _J. Gould and H. C. Richter del et lith._ _Hullmandel & Walton Imp._ ] TROPIDORHYNCHUS CITREOGULARIS, _Gould_. Yellow-throated Friar-Bird. _Tropidorhynchus citreogularis_, Gould in Proc. of Zool. Soc., Part IV. p. 143; and in Syn. Birds of Australia, Part I. _Ȁr-dulk_ and _Wȕl-loo-rat?_ Aborigines of Port Essington. _Leather-neck_ of the Colonists of Port Essington. _Yellow-throated Friar_, Colonists of New South Wales. This is strictly a bird of the interior of the south-eastern portion of Australia, and is never, so far as I am aware, found on the sea-side of the mountain ranges. I observed it in tolerable abundance during my tour to the Namoi; first meeting with it in the neighbourhood of Brezi, whence as I descended the river to the northward it gradually became more numerous. I killed both adult and young birds in December, the latter of which had just left the nest, consequently the breeding-season must have been about a month previous. The yellow colouring of the throat represented in my ‘Synopsis of the Birds of Australia,’ is peculiar to the period of immaturity; in the adult this colouring is entirely wanting, and the bird is one of the plainest-coloured species of the Australian Fauna. Its habits and manners are very similar to those of the _Tropidorhynchus corniculatus_; like that bird it feeds on insects, berries, fruits, and the flowers of the _Eucalypti_, among the smaller branches of which it may constantly be seen hanging and clinging in every possible variety of attitude.