1847.] Proceedings of the Asiatic Society. 993 



but they resemble, and differ from all the rest, in having' a white tail crossed 

 by a black band, occupying its subterminal fourth or fifth ; and the first species 

 alone has a white wing-band, and the white of its occiput and neck is strongly 

 tinged with fulvous. 



1. B. cavatus, Shaw, Vieillot : B. homrai, Hodgson, As. Res. XVIII, pt. 

 II, 169 et seq., with coloured figure and views of the casque at different ages : 

 probably B. bicornis, Lin., in which case its range of distribution would 

 extend to the Philippines. Adult male and female, and skeleton of a female, 

 from Arracan ; presented by Capt. Phayre : and large head of an Assamese 

 specimen, that was presented by Dr. McCosh. This great species inhabits 

 the more extensive hill forests of all India, but would seem to be considerably 

 more numerous, and also much easier to procure, along the whole eastern 

 coast of the Bay of Bengal, from the Straits of Malacca northward to Sylhet 

 and Assam. The female is rather smaller than the male, and (as also in B. 

 rhinoceros and B. pica) may be readily distinguished by having the hindmost 

 portion of the casque pale, instead of black. 



2. B. rhinoceros, Lin. : and the young, probably B. niger, Shaw (nee 

 Vieillot), jB. sylvestris, Vieillot, and B. diadematus, Drapiez. Very fine adult 

 male, and young ; presented by the Rev. F. T. Lindstedt : and adult female, 

 presented by the Rev. J. Boaz : all from Malacca. Inhabits the Malayan 

 peninsula and archipelago. The sexual differences are pointed out in XIV, 188. 



Next may be introduced the species before referred to, as constituting an 

 exception to the general coloration of the others of this group. Its upper 

 parts are of a dusky greyish-brown, rather than black ; the head,, neck, and 

 thighs are deep ferruginous ; the lower-parts and facial mask (as in B. cavatus) 

 are alone black ; and the tail is fulvous-white, as are often the exterior wing- 

 feathers, to a greater or less extent (even on the two wings of the same bird) : 

 but the casque is broad and flat posteriorly, protruding far backward over 

 the forehead ; and the nearest affinity appears to be with B. cavatus, of which 

 some authors have even considered it the young. 



3. B. hydrocorax, Lin. : B. bicornis, var., Shaw ; B. cristatus, Vieillot ; 

 JB. platyrhynchus, Pearson, X, 652. Specimen described in XII, 988. This, 

 with the specimen of B. panayensis, was presented with the Macao collection 

 by R. Inglis, Esq., as noticed in V, 249 : both species inhabit the Moluccas. 



The next three are very closely allied. Colour black, with white abdomen 

 and wing-tips, and all or part of the four outer tail-feathers on each side : 

 the casque high, simple, well projected backward over the forehead, compressed 

 and pointed to the front, where it advances at a more or less acute angle with 

 the ridge of the upper mandible. 



4. B. pica, Scopoli : B. malabaricus, var. B, Latham ; B. monoceros, and 

 probably B. violaceous, Shaw; Bcegma Dmnase, White, As, Res. IV, 119 : 



