HYDROCISSA EXARATA. 



WHITE-CHEEKED HOENBILL. 



Buceros exarhatus, Temm. Plan. Col. vol. ii. pi. 211 ?; Wagl. Syst. Av. (1827) sp. 15 ; Mull, and Schleg. Verh. 



Gesch. Ned. Ind. (1839-44) p. 23; Gray, Gen. Birds (1846) vol. ii. p. 400. sp. 26; Schleg. Mus. Pays-B. 



(1862) p. 10; Gray, Hand-1. B. (1870) pt. ii. p. 128. sp. 7880. 

 Buceros exaratus, Blyth, Cat. B. Mus. Asiat. Soc. (1849) p. 44. sp. 187; Wald. Trans. Zool. Soc. (1871) vol. viii. 



p. 47. sp. 57; Giebel, Thesaur. Ornith. (1872) p. 498. 

 Hydrocissa exarata, Bon. Consp. Gen. Av. (1850) p. 90. sp. 6. 

 Anorhinus exaratus, Bon. Consp. Vol. Anisod. (1854) p. 2. 



Hab. Malacca, Celebes (Meyer). 



Temminck first described and figured this species in the ' Planches Coloriees.' It is a native of 

 Malacca and Celebes. Some authors have placed this bird in the same genus with Anthracoceros 

 coronatus, A. malabaricus, &c. Erom such species, however, the present one is separated by the 

 shape of its casque. Properly speaking it has none, but the culmen is covered by a ridged crest ; 

 while the species above named all possess well-developed, peculiarly shaped and conspicuous casques, 

 having nothing in common with that exhibited by Hydrocissa exarata. As I have shown in my 

 article on Anthracoceros coronatus, the present species is the only one that can be selected to 

 represent Bonaparte's genus Hydrocissa, the other species included by him in that term having 

 previously been placed in distinct genera by Beichenbach. Of the habits and economy of this 

 species nothing has been recorded. 



Male. — The bill has the maxilla rufous, the point and base yellowish white. A crest runs from 

 the base of maxilla to within an inch of the point, compressed laterally, its sides indented for their 

 entire length by three deep grooves. The anterior end slopes rapidly to the culmen. The mandible 

 is yellowish white, a black band starts from the base, runs upwards along the gape for about one 

 third its length, then becomes apparently dark red for another third part. Superciliary stripe, 

 cheeks, and throat white ; rest of plumage jet black ; wings and tail with a greenish gloss. Peet 

 and tarsi black. Bare skin on throat near base of mandible flesh-colour. 



Total length 22 inches ; wing 10 ; tail 10 ; bill along gape 4 ; length of crest 2^, height of bill 

 and crest at base If. 



Female.—- Bill like the male, but smaller, as is also the crest, which is deeply grooved, precisely 

 in the same manner. The anterior end slopes gradually to the culmen. Bare skin of throat, 

 apparently, black or bluish-black. The entire plumage is black, wings and tail glossed with green. 



Total length 21 inches, wing 8, tail 8, tarsus 1 \. 



Specimens described and figured are in my own collection, procured from Mr. Wallace. 



m 



