FAM: BUCERODTIDZA 
On 
I. GENUS RHINOPLAX GLOGER 
Rhinoplax Gloger, Hand- u. Hilfsb. p. 335 (1842) (type: R. galeatus). 
Synonyms : Cyranoceros Reichenbach, Syst. Avium, pl. 1 (1849) (type : Buceros vigil); Buceroturus 
Bonaparte, Consp. Gen. Avium, Vol. 1, p. 89 (1850) (type : B. galeatus). 
Characters. Bill moderate, sloping to a sharp point; anterior wall of casque solid, 
cylindrical, extending from the middle of the eye and ending abruptly in front at right angles 
to the middle of the culmen. Skin round the eye, throat, neck and a stripe down the centre of 
the back naked. Wings long, reaching a short distance beyond the upper tail-coverts, Centre 
pair of tail-feathers very long. 
Geographical Distribution. Malay Peninsula, Sumatra, Borneo. 
1. Rhinoplax vigil (Forster). (Plate 3, Fig. 5.) South Tenasserim, Ma- 
Buceros vigil Forster, Ind. Zocl. p. 40 (1781). lacca, Sumatra, Bor- 
neo. 
Buceros scutatus Boddaert, Tabl. Pl. Enl. p. 55 (1783). 
Buceros galeatus Gmelin, Syst. Nat. Vol. 1, p. 360 (1788). 
Rhinoplax galeatus Gloger, Hand- u. Hilfsb. p. 335 (1842). 
Buceroturus galeatus Bonaparte, Consp. Gen. Avium, Vol. 1, p. 89 (1850). 
Rhinoplax scutatus Horsfield & Moore, Cat. Birds Mus. I. Ind. Co. Vol. 2, p. 581 (1856). 
Rhinoplax vigil Elliot, Monogr. Bucerot. (text) pl. 10 (1882). 
2. GENUS CRANORRHINUS CaABANIS & HEINE 
Cranorrhinus Cabanis & Heine, Mus. Heinean. Vol. 2, p. 173 (1860) (type : Buceros cassidix). 
Synonym : Cassidix, Bonaparte, Consp. Gen. Avium, Vol. 1, p. go (1850). 
Characters. Bill large, curved and compressed; base of both mandibles, or the lower 
only, transversally grooved; casque elevated in front and rounded off behind, covering nearly 
the basal half of the culmen, subcylindrical and smooth, or somewhat compressed and folded. 
Throat naked. Crest more or less developed. Wings ample. Tail long, rounded. Head 
coloured in the males, black in the females. Four species are known. 
Geographical Distribution. Malacca, Sumatra, Borneo, Celebes and Philippine 
Islands. 
KEY TO THE SPECIES 
A. Base of both mandibles grooved. 
Mem GUS RCN Ci Cicem CEE par dtleme NCUIUAcCl/ iz Cae a  e  @-eGASS ID Iya 
B. Base of the lower mandible grooud only’. 
2. Lail with basal thind black. vest buffy-white. . . . . . . . . . . €, GCORRUGATUS. 
3. Dail white, with a terminal black band . . . . . =. ~~. =. ~. ~~. ~~. +. €. LEUGOCEPHALUS. 
4 Tail whitish or cinnamon, apical portion and basal third greenish black. . . C. WALDENT. 
1. Cranorrhinus cassidix (lemminck). (Plate 2, Fig. 3.) Celebes. 
Buceros cassidix Vemminck, P1. Col. Vol. 2, p. 66, pl. 210 (1823). 
Culao cassidiy Bonaparte, Consp. Gen. Avium, Vol. 1, p. 90 (1850). 
