142 BTTCEEOTID^. 



Genus DICHOCEROS, Gloger, 1842. 



Si/e large. Bill very large, stout and much curved ; casque large 

 and broad, covering more than the basal half of the culmen, the 

 sides flat and vertical behind, the top overhanging in front, the 

 posterior edge broad, projecting over the head behind and 

 rounded, the upper surface flat behind, concave in front, ter- 

 minating anteriorly in two lateral points that are blunted in old 

 birds. No conspicuous crest ; feathers of head loose-textured ; 

 chin covered with feathers ; tail slightly rounded at end. Sexes 

 alike in plumage. 



The casque is small and pointed in front in the young and 

 becomes gradually developed as in all Hornbdls. 



A single species. 



1051. Dichoceros bicornis. The Great Homhill. 



Buceros bicornis, Linn. Syst. Nat. \, p. 153 (1766) ; Elliot, His, 1877, 



p. 416. 

 Buceros cavatus, Shmo, Gen. Zool. viii, pt. 1, p. 18 (1812) ; Jerdon, 

 Madr. Jour. L. S. xi, p. 37; JBli/tk, J. A. S. B. xii, p. 986; xvi, 

 p. 993 ; id. Cat. p. 42 ; Tickell, J. A. S. B. xxiv, p. 279 ; Baker, 

 J. A. S. B. xxviii, p. 292. 

 Buceros homrai, Hodgs. J. A. S. B. i, p. 251 (1832) ; id. As. Res. 



xviii, pt. 2, p. 169, pi. 

 Dichoceros cavatus, Gloger, Hand- u. Hilfsh. p. 335 ; Fairbank, S. F. 

 iv, p. 254 ; Huine S)- Bourdillon, ibid. p. 384 ; Hu7ne ^- Imjlis, S. F. 

 V, p. 20 : Hume ^ Dav. S. F. vi, p. 98 ; Gates, S. F. vii, p. 45 ; 

 Hume, Cut. no. 140 ; id. S. F. xi, p. 51 ; Bingham, S. F. viii, 

 p. 461 ; ix, p. 158 ; Vidal, S. F. ix, p. 50; Butler, ibid. p. 383 ; 

 Davison, S. F. x, p. 352 ; Macgregor, ibid. p. 436 ; Barnes, Birds 

 Bom. p. 104 ; Davidson, Jour. Bomb. N. H. Sac. vi, p. 333. 

 Homraius bicornis, ^o?iff/:>. Consp. Vol. Anisod. t^. 2; Horsf. <$- M. 

 Cat. ii, p. 583 ; Jerdon, B. I. i, p. 242 ; id. Ibis, 1872, p. 4 ; Godw.- 

 Anst. J. A. S. B. xliii, pt. 2, p. 154. 

 Buceros (Homraius) cavatus, Tickell, Ibis, 1864, p. 176. 

 Dichoceros bicornis, Blgtk 4" ^Vdld. Birds Burm. p. 68 ; Wardl- 

 Rams. Ibis, 1877, p. 454 ; Elliot, Mon. Buc. pi. vi ; Gates, B. B. 

 ii, p. 87 ; id. Ibis, 1888, p. 72 ; id. in Hones N. S^- E. 2nd ed. iii, 

 p. 68 ; Salvadori, Ann. Mus. Civ. Gen. (2) v, p. 571 ; vii, p. 381 ; 

 Ogilvie Grant, Cat. B. M. xvii, p. 355 

 Homrai,li. Nepal; Banrao,ll. Mussooiee ; Evgrong,lL,efcha; Garuda, 

 Can. ; Garud, Mabr. ; Malk Moraki, Mai. ; Hivang, Assamese ; Ouk-chin- 

 gyee, Burm. 



Coloration. Head all round as far back as ends of ear-coverts 

 black ; neck all round fulvescent white ; back, rump, scapu- 

 lars, median and lesser wing-coverts, breast and under wing- 

 coverts black ; greater coverts and quills black, with the bases and 

 ends white ; lower abdomen, upper and under tail-coverts white ; 

 tail yellowish white, with a broad subterminal black band on 

 each feather. 



Bill and casque yellow-, tinged with red at the tip and with 

 oranf^e in the middle. In the male the culmen in front of the 

 casque, a triangidar patch at each side of the anterior end of the 



