I 



Kj. BTCANISTES. 417 



Bill rather short, deep, and compressed, either with a large 

 elevated, subcyliudrical, compressed casque, longitudinallj- or trans- 

 versely furrowed, covering the basal three-quarters of the culmeii 

 or more, and extending over the skull behind the eye, or with the 

 casque quite rudimentary, scarcely rising above the level of the 

 culmen. Plumage black and white. Tail subquadrate. Crest large, 

 composed of long soft feathers. 



RaiKje. Africa. 



Key to the Species. 



I. Breast and belly white. 



a. Well-developed casque. 



a. Outer tail-feathers black tipped with white, buccinator, p. 421. 

 h' . Outer tail-featiiers white leucopi/(/ius, p. 418. 



b. Very slight casque. 



c'. Outertail-feathersblacktipped with white, fistulator, p. 422. 

 d' . Outer tail-feathers pm-e white (or nearly 



so) sharjni, p. 422. 



II. Breast black, belly white. 



c. Feathers on sides of head and chest with 



grey ends. 

 e'. Ends of secondaries black (sometimes 



slightly margined with white) cristatus, p. 417. 



/'. Outer half of secondaries white. [p. 419. 



a". Greater secondary coverts black suhcylindricus, 



b" . Greater secondary coverts with white 



ends subquadrcdus, p. 419. 



d. Feathers on sides of head and crest black. 



(/. Thighs black in front cyUndriciis, p. 420. 



//, Thighs pure white albotibialis, p. 420. 



1. Bycanistes cristatus. 



Buceros cristatus, Hilpp. Faun. Abt/^s., J'or/el, p. 3, pi. i. (IS-j-j) ; id. 



.Si/sf. Uebers. Vd(/. X.O.-Afi: p. "79 (lS4o); Grai/, Gen. Birdx, ii. 



p. 399 (1847) ; ' Cass. P. Ac. Philad. p. 139 (1859); Schl. Mas. 



Pai/s-Bas, i. Buceros, p. 16 (18fi2) ; HeuffL J. f. O. 1804, p. 270; 



Sciat. P. Z. S. 1864, p. Ill ; Kirk, Ibis, 1864, p. 326 ; Finsck S,- 



Hartl. Viig. Ostafr. p. 482 (1870); Hciigl. Om. N-O.-Afr. i. 



pp. 731 & clvi (1871); Elliot, Ibis, 1873, p. 178; S/iarpe, ed. 



Layard's B. S. Afr. p. 120 (187o) ; Fisch. ^- Peich. J. f. O. 1880, 



p. 141 ; Fisch. Zcit. yes. Orn. 1884, p. 361 ; id. J. f. O. 1885, 



p. 126; S/iello/, P.Z.S. 188-5, p. 224; Eeichen. J. f. O. 1887, 



p. 60 ; S/iellc;/, 'ibis, 1888, p. 52. 

 Bucorvus cristatus, Bonap. Consp. Gen. Av. i. p. 89 (1850). 

 Tmetoceros cristatus, Bonap. Consp. Vol. Anisod. p. 2 (1854). 

 Bvcanistes cristatus, Ciih. Sf Heine, Mus. Hein. ii. p. 172, note 



"(I860) ; Cab. V. d. Decken's Peis. iii. p. 38 (1869) ; Flliot, Mon. 



Burerot. pi. 26 [text] (1877); Shelley, P.Z.S. 1881, p. 591; 



Salvad. An7i. 3Ius. Civ. Genov. xxi. p. 102 (1884). 

 Buceros (Bvcanistes) cristatus, Gray, Hand-l. B. ii. p. 331, sp. 7912 



(1870) ; 'Dtibois, Bull. Mus. Bely.'iu. p. 200 (1884). 



Adidt male. Ear-coverts greyish white ; rest of head black, glossed 



>T.. XVII. 2 E 



