S.'f) bucerotid.t;, 



(1847) ; Bhiih, Cat. B. As. Soc. Beng. p. 42 (1849) ; Blcmf. Ibis, 

 1870, p. 466. 



Dichoceros cavatus, Gloff. Hand- ii. Hihfb. p. 335 (1842) ; Eurne, 

 Str F. iii. p. 20 (1875) ; Fni?-b. Str. F. iv. p. 254 (1876); Bour- 

 flillon, Str. F. iv. p. 384 (1876) ; hu/lis, Str. F. v. p. 20 (1877) ; 

 Hume S,- Bar. Str. F. vi. p. 98 (1878) ; Oafcs, Str. F. vii. p. 45 

 (1878) ; Hume, Str. F. viii. p. 86 (1879) ; Binrjham, Str. F. viii. 

 p. 461 (1879), and ix. p. 158 (1880) ; Vidal, 'Str. F. ix. p. 50 

 (1880) ; Butlvr, Cat. B. S. Bombay Pres. p. 20 (1880) ; id. Str. 

 F. ix. p. 383 (1880); Oates, Str.F. x. p. 188 (1882); Davisoii, 

 Str. F. X. p. 352 (1883) ; Hume, Str. F. xi. p. 51 (1888). 



Buceroi? (Ilomraius) cavatus, Tickell, Ibis, 1864, p. 176. 



Buceros cristatus, Vieill. N. Diet. d'Hist. Nat. iv. p. 591 (1816). 



Buceros honirai, Hodqs. Icon. ined. in Brit. Mus. Pass. pis. 311 & 

 312 (no. 599) ; Oray, Zool. Misc. p. 85 (1831) ; Hodgs. J. As. Soc. 

 Benq. i. p. 251 (1832) ; id. As. Res. xviii. pt. ii. no. xi. p. 162 

 (1833) ; Graij, Gen. B. ii. p. 349 (1849) ; id. Hand-l. B. pt ii. 

 p. 127, sp. 7871 (1870). 



Dichoceros homrai, Hume, Nests ^ Ff/gs Ltd. B. p. Ill (1873) ; 

 id. Str. F. ii. p. 470 (1874) ; id. I. c. iii. p. 55 (1875). 



Adult male. Head, chin, throat, back, rump, and breast deep 

 black, also lesser and median upper wing-coverts and under wing- 

 coverts ; greater wing-coverts, primaries, and secondaries black, 

 with whitish bases and extremities ; tail yellowish white, with a 

 broad subterminal band of black across each feather. Neck buff; 

 upper tail-coverts, belly, thighs, and under tail-coverts whitish. 



Naked skin round the eye fleshy pink ; eyelid black ; iris blood- 

 red ; legs and feet dull green ; bill and casque yellowi.«h, inclining 

 to orange-red on the top of the casque and towards the point of the 

 upper mandible ; basal portion of both mandibles and their cutting- 

 edges black, also the anterior and posterior margins of the casque, 

 the black of the former extending backward along either side in a 

 triangular patch nearly reaching to the nostrils. Total length 52 

 inches, wing 19-5, tail 15-3, tarsus 2-9. 



Adult female does not differ from the adult male in plumage, 

 but the casque is without black marking ; bare skin round the 

 eye reddish ; iris opalescent white. Total length 49 inches, wing 

 19-3, tail 15-3, tarsus 2-8. 



Immature male and female resemble the adult in plumage, and 

 differ only in the shape of the casque, which is flat and triangular ; 

 gradually the lateral ridges appear, the anterior angle disappears, 

 and the casque assumes the' subquadrato shape characteristic of the 

 adult. 



Hcth. Indo-Chinese Countries, Malayan Peninsula, Sumatra. 



a,b. cJ $ ad. sk. Mynall, Travancore, Oct., Nov. Hume Coll. 

 {F. Bourdillon). 



c. S ad. sk. Eatnagiri, S. Konkau, Nov. (<?. Hume Coll. 



Vidal). 



d. S ad. St. Himalayas. 



e-g. (S ? ad.; Kumaon, March {G. King). Hume Coll. 



$ imm. sk. 



