418 BTJOEROTTDiE. 



■with dark green at the end of each feather, and, except the longer 

 crest-feathers, ti])ped with greyish white; throat, neck, npper back, 

 "wings, chest, breast, npper part of bellj', and front of thighs black 

 glossed with dark green, especially the npper parts; lower back, rump, 

 inner side of shoulders, under wing-coverts, bases of primaries, lower 

 part of belly, back of tliighs, and tail-coverts white ; basal portion 

 of all the tail-feathers and terminal quarter of all excejit the central 

 pair white, rest black glossed with dark green like the back : naked 

 skin round eye blue ; iris crimson ; legs and feet black ; casque very 

 large, striated and corrugated, and of a yellowish-white colour ; bill 

 brownish yellow, lighter towards the tip, an orange-yellow band 

 across the base from the nostril to the angle of the lower mandible. 

 Total length 29 inches, wing 15, tail 11, tarsus 2-4. 



Adult female. Differs from the adult male only in the shape and 

 coloration of the casque, which is much less developed and of a dark 

 colour similar to the bill ; naked skin round the 63-6 blue. Total 

 length 27 inches, wing 13-4, tail 10-2, tarsus I'S. 



Immature male with casque half-developed has the siiperciliary 

 feathers and those of the front of the head mixed with rufous-butf. 



Hah. East Africa, from Abyssinia to the Zambesi. 



a-c. c? ad. et imm. Pangani Eiver (KirJc). Shelley Coll. 

 sk. 



d. (J ad. sk. Shire River, Zambesi. Sir John Kirk [P.]. 



e. cJ ad. sk. Shire River, Zambesi {Living- Earl Russell [P.]. 



stone). 

 fj9- c? 2 ad. sk. Kilimanjaro (7/. H. Johnston). British Assoc. [P.]. 

 h. S ad. (head only). 

 J, k. (S 2 ad. St. Abyssinia. 



2. Bycanistes leiicopygius. 



Buceros (Bycanistes) leucopvgius, Dtihois, Bull. Mus. Belg. iii. 

 p. 202 (1884). 



Adult. General jjlumage greenish black ; greater wing-coverts 

 tipped with white ; first primary black, second with the tip and 

 greater part of the inner web white, third entirely white with a 

 black mark on the middle; fourth, fifth, and sixth white, with the 

 outer web black except the tip ; secondaries white ; breast, rump, 

 and tail-coverts white ; tail white, with the centre pair of feathers 

 black with green reflexions : iris dark brown ; feet black ; bill and 

 casque yellowish, the latter rounded but compressed in front and 

 merging into the line of the culmen (Dubois). Wing 10-8 inches. 



Young. Bill and casque like that of the adult; the black parts 

 still intermixed with brown feathers ; the colours of the primaries 

 differ from those of the adult, all are black irregularly tipped with 

 white, and the greater wing- coverts are not tipped with white 

 {Dubois). 



Hab. Nyam-nyam. 



