Tas. XIII. TURDUS ERYTHROGASTER. Mas. Turd. grisescenti-ceruleus ; genis, colli lateribus, remigibusque atris ; pectore, abdomane, crissoque rufis. Fem. Cinerascenti-brunnea, dorso imo obscure fusco fasciato, collo im fronte albescentt, fusco- brunneo notato ; pectore, abdomine, crissoque rufescenti-albo undulatim notates. Longitudo corporis, 82 unc. ; alee, 42; caudw, 3+; rostrt, 1; tarse, 1. Tue present beautiful species of Thrush exhibits a marked departure in the style of colourmg from its more typical congeners; and were it not that its form dictated the situation in which it is retained, it would other- wise seem to be allied in many respects to the genus Peérocincla. It is a native exclusively of the rocky districts of the Himalaya, and is never found in the low lands. The male of this species has the upper surface of a deep greyish blue, and the cheeks, sides of the neck and quill-feathers black ; the breast and whole of the under surface of a fine rufous ; beak and tarsi black. The female differs, as may be seen in the Plate,—a singular contrast to her richly painted male, being of a sober brown on the upper parts with a yellowish white mark on the sides of the neck, and the under parts of the same colour, thickly intermingled with spots of brown. The birds are represented of their natural size.