CRANORRHINUS LEUCOCEPHALUS 



WHITE-HEADED HOENBILL. 



Buceros leucocephalus, Vieill. Nouv. Diet. Hist. Nat. (1816) vol. iv. p. 592. 



Buceros sulcatus, Temm. Plan. Col. vol. ii. pi. 69 ; Wagl. Syst. Av. (1827) sp. 10 ; Less. Trait. Ornith. (1831) 



p. 254. sp. 11 • Gray, Gen. Birds (1849), vol. ii. p. 400. sp. 25 ; Schlegel, Mus. Pays-B. (1862) p. 10; Gray, 



Hand-1. B. pt. ii. (1870) p. 129. sp. 7891. 

 Tockus sulcatus, Bon. Consp. Gen. Av. (1850) p. 91. sp. 1. 

 Calao sulcatus, Bon. Consp. Vol. Anisod. (1854) p. 3. 



Buceros (Penelopides) sulcatus, Von Mart. Jonrn. fur Ornith. (1866) p. 18. 

 Cranorrhinus leucocephalus, Wald. Trans. Zool. Soc. (1875) p. 165, pi. 27. fig. 1 ($), fig. 2 ( ? ); id. Proc. Zool. Soc. 



(.1877) p. 824. sp. 28. 



Hab. Mindanao (Schlegel) ; Island of Camiguin (Brit. -Mus. specimen). 



The adult of this species is known to ornithologists chiefly from Temminck's plate, taken from 

 the specimen in the Leyden Museum. It seems to be allied to C. cassidix from its elevated casque 

 and deep transverse grooves at the base of the mandible. It was first described by Vieillot, as 

 given above ; but Temminck afterwards called it sulcatus, by which name it has usually been 

 recognized, Vieillot' s description having been overlooked. Although the latter states that the 

 plumage is black generally, yet he says, at the same time, that his description was taken from 

 Temminck's specimen. He probably had a female before him. 



Male. — Bill curved, red. An elevated crest of a bright red colour, corrugated with deep 

 furrows, runs along the culmen for about one half its length. At base of mandible are four deep 

 diagonal ridges. Top of head and back of neck dark foxy red. Throat bare at base of mandible 

 for about an inch ; this is fiery orange-red ; around the skin the feathers are whitish. Bare skin 

 around the eyes bright orange-red. Side of neck and upper part of breast deep buff. Best of 

 body and wings black. Tail buffy white, probably darker in life, with an apical black band. Iris 

 crimson ; feet dark brown. 



Bill from eye to tip 5 inches, length of casque 2f, height of casque 1J inch, from edge of 

 maxilla to top of casque 2, width of mandible 1 inch, wing 14, tail 10, tarsus 2. (Ex type, 

 Leiden Museum.) 



Female. — Jet black. Tail buffy white, with an apical black band. 



Total length 20J inches, wing 11, tail 9, bill 4J. (Ex specimen in British Museum.) 





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