OCR Text |
Show 1878.] THE MARQUIS OF TWEEDDALE ON A NEW HORNBILL. 279 The iris of an adult male from the island of Panaon is recorded by Mr. Everett as being "pale blue." Distinct slightly corrugated basal plates are present on the walls of the mandibles of the adult birds. The first plumage has little resemblance to that of maturity. The space between the rami of the mandible and the patch at the base of the sides of the mandible is dirty brown. The head, neck, breast, Side view of bead of Buceros semigakatus. Head of Buceros semiyalcafus, from above. and abdomen are dirty greyish fulvous-white, the feathers of the head, neck, and upper breast being ferruginous at their insertions and grey at their tips ; and such is the character of the thigh-coverts and ventral plumage. The upper tail-coverts are also dirty greyish-fulvous white, with either brown or ferruginous bases. The dorsal plumage and the quills and other wing-feathers are brown, the quills dark brown, with broad terminal dirty greyish-fulvous white marks or edgings. The middle pair of rectrices are for two thirds of their length pale brown, the apical third being white or dirty creamy white. All the other rectrices have the basal part to a greater or less extent pale brown, or pale rusty-brown. In some, probably the new feathers, the whole rectrix is white. In the plumage described |