12 PICARLA 
Bycanistes leucopygiuns Ogilvie-Grant, Cat. Birds Brit. Mus. Vol17, p. 418 (1892); 
Shelley, Birds Afr. Vol. 1, p. 113 (1896); Dubois, Syn, Avium, Vol. 1, p. 101 (1899) ; 
Ann. Mus, Congo, Zool. (4), Tome 1, p. 6, pl. 4 (S, 2) (1905); Proc. fourth Intern. 
Ornith. Congr. (Lond. 1905), p. 519 (1g07); Bull. Soc. Zool. Fr. p. 133 (1909). 
Buceros vivi Ogilvie-Grant, Cat. Birds Brit. Mus. Vol. 17, p. 423 (1892) (in synon. 
nec Dubois). 
3. Bycanistes fistulator (Cassin). (Plate 3, Figs. 3, 3a.) West Africa, from Sene- 
Buceros fistulator Cassin, Proc. Acad. Nat. Sc. Philad. Vol. 5, p. 68 (1852). gambia to Angola. 
Tmetoceros fistulatoy Bonaparte, Cons). Volucr. Anisod. p. 2 (1854). 
Buceros leucostigma (temminck) Schlegel, Mus. Pays-Bas (Buceros), p. 16 (1862). 
Buceros (Bycanistes) fistulatoy Gray, Hand-list of Birds, Vol. 2, p. 131 (1870). 
Buceros sharpti Elliot, The Ibis, pp. 177, 179 (&) (1873). 
Bycanistes sharpei Bouvier, Cat. p. 28 (1875). 
Pholidophalus fistulator et sharpii Elliot, Monogr. Bucerot. pls. 32, 33 (1882); Dubois, 
Syn. Avium, Vol. 1, p. ror (1899). 
Bycanistes fistulatoy Ogilvie-Grant, Cat. Birds Brit. Mus. Vol. 17, p. 422 (1892). 
4. Bycanistes cristatus (Riippell). East Africa, from Abys- 
Buceros cristatus Rippell, Fauna Abyss. Vog. p. 3, pl. 1 (1835). Ss 
Bucorvus cristatus Bonaparte, Consp. Gen. Avium, Vol. 1, p. 89 (1850). 
Tmetoceros cristatus Bonaparte, Consp. Volucr. Anisod. p. 2 (1854). 
Bycanistes cristatus Cabanis & Heine, Mus. Heinean. Vol. 2, p. 72 (1860); Elliot, Monogr. 
Bucerot. pl. 26 (1882). 
5. Bycanistes subcylindricus (Sclater). West Africa : Angola, 
Buceros subcylindricus Sclater, Proc. Zool. Soc. Lond. p. 668, pl. 39 (2) (1870); Dubois, ee ae 
Bull. Mus. Hist. Nat. Belg. Vol. 3, p. 201 (1884). oy acne zie 
= . . e x 0 . yy g . 
Bycanistes subquadvatus Cabanis, Journ. f. Ornith. p. 350, pl. 1 (G) (1880). Sea 
Buceros subquadratus Hartlaub, Abh. Bremen, p. 208 (1882). 
Bycanistes subcylindricus et subquadratus Elliot, Monogr. Bucerot. pls. 18, 19 (1882). 
6. Bycanistes aloysii Salvadori. Ruwenzori, 
Bycanistes aloystt Salvadori, Boll. Mus. Zool. Anat. comp. Univ. Torino, Vol. 21, no. 542 
(1906). 
7. Bycanistes cylindricus (Temminck). North-western Africa, 
Buceros cylindricus Yemminck, P1. Col. Vol. 2, p. 76, pl. 521, f. 2 (1824). ie Gaboon ‘to Lis 
Bucorvus cylindricus Bonaparte, Consp. Gen. Avium, Vol. 1, p. 89 (1850). ena 
Tmetoceros cylindricus Bonaparte, Consp. Volucr. Anisod. p. 2 (1854). 
Bycanistes cylindvicus Cabanis & Heine. Mus. Heinean, Vol. 2, p. 173 (1860); Elliot, 
Monogr. Bucerot. pl. 30 (1882). 
Buceros casuarinus Gray. Ann. Mag. Nat. Hist. Vol. 8, p. 437, pl. 17 (1871). 
Pholidophalus casuarinus Elliot, Monogr. Bucerot. pl. 34 (1882). 
8. Bycanistes albotibialis (Cabanis & Reichenow),. Cameroons, Gaboon, 
Buceros albotibialis Cabanis & Reichenow, Journ, f. Ornith. pp. 19, 103 (1877), pl. 1 (GC) oan, BelpianeGr 
go. 
(1878). 
Bycanistes albotibialis Elliot, Monogr. Bucerot. pl. 31 (1882). 
Pholidophalus kethulle’ Dubois, Ornith. Monatsb., p. 69 (2) (1900); Syn. Avium, Vol, 2, 
p- 1061 (1903). 
9. GENUS RHYTIDOCEROS REICHENBACH 
Rhytidoceros Cabanis & Heine, Mus Heinean. Vol. 2, p. 172 (1860) (type : Buceros obscurus). 
Synonyms : Rhyticeyos Reichenbach, Syst. Avium, pl. 1 (1849) (type : Buceros undulatus) ; Calao Bona- 
parte, Consp. Gen. Avium, Vol. 1, p. go (1854) (type: Buceros plicatus). 
Characters. Bill large, curved and compressed; culmen covered for nearly half its 
basal length by a casque like protuberance, apparently formed of Jarge scales overlapping 
each other; base of both mandibles grooved or not grooved transversally. Throat naked. Crest 
well developed. Wings ample. Tail long, subequal, white or black. 
