4l!0 BFCKROTTn.T:. 



to the base of the lowor mandilil"- : iris crimson ; legs black. Total 

 length 28 inches, wing 14, toil lU-5, tarsus 2-1. 



Iliih. Talla Mogongo, Angola : Nyam-uj-am Country, Ui)per White 

 Nile District, Elgon,'6000-S000 ft. {Jadson). 



5. Bycanistes albotibialis. 



Biiceros albotibialis, Cah. .V lieich. J. f. O. 1877, pp. 19 & 103, 1878, 



pi. i. ; BoccK/e, Orn. Avgnla, p. .540 (1881) ; Shelley, Ibis, 1888, 



p. m ; Reich. J.f. O. 1890, p. 114. 

 Bycanistes albotibialis, Mliot, Mon. Biicerot. pi 31 [text] (1880) ; 



'Ilartert, Cat. Mus. Sejickenb. Franhf. p. 141 (1891). 

 Biiceros (Bycanistes) albotibialis, Dubois, Bull. Mus. Behj. iii, p. 202 



(1884). 



Adult. Head, neck, back, wing- coverts, and breast black glossed 

 with dark green ; inner side of shoulders, rump, belly, thighs, and tail- 

 coverts white ; base of primaries and secondaries and the terminal 

 part of the quills except the first two primaries white ; tail white 

 with a wide subbasal black baud glossed with dark green ; naked 

 skin round the eye and on throat reddish yellow (in skin) ; legs and 

 feet black ; base of casque and basal three-quarters of bill blackish, 

 rest white ; the anterior portion of the casque extends forward to 

 within an inch of the end of the culmen. Total length 28 inches, 

 wing 13, tail 8-8, tarsus 1-8. 



Hah. W. Africa. 



a. Ad. st. Gaboon. Purchased. 



6. Bycanistes cylindricus. 



Buceros cylindricus, Temm. PI. C<>1. ii. p. 76, pi. 521. fig. 2 (1824) ; 



Gray, Gen. Birds, ii. p. 399 (1847) ; Hartl. J. f. O. 1854, p. 127 ; 



Ilartl. Orn. W.-Afr. p. 162 (1857) ; Cass. P. Ac. Philad. 1859, 



p. 139; Schl. Mils. Pays-Bas, i. Buceros, p. 17 (1862); Sharpe, 



Ibis, 1872, p. 67 ; Flliot, Ibis, 1873, p. 178 ; Ussher, Ibis, 1874, 



p. 51 ; Bilttikofcr, Notes Leyd. Mus. iv. p. 206 (1885) ; Shelley, 



Ibis, 1888, p. 55. 

 Bucorvus cylindricus, Bonap. Consp. Gen. At: i. p. 89 (1850). 

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

 Bycanistes cylindricus. Cab. ^ Heine, Mus. Hein. ii. p. 173 (1860) ; 



Elliot, Mon. Bucerot. pi. 30 [text] (1881) ; Sdat. P. Z. S. 1885, 



p. 851. 

 Buceros (Bycanistes) cylindricus, Dubois, Bull. Mus. Belg. iii. p. 201 



(1884). 

 Buceros (Byanistes?) casuarinus, Gray, Ann. §• Maq. N. H. viii. 



p. 437, pi. xvii. (1871) ; Bocaye, P. Z. S. 1873, p. 703. 

 Buceros (Pholidophalus) casuarinus, Dubois, Bull. Mus. Belg. iii, 



p. 205 (1884). 

 Pholidophalus casuarius, Elliot, Mon. Bucerot. pi. 34 [text] (1882). 



The plumage is similar to that of B. alho/ibialis, except that the 

 black of the breast is continued down the front of the thighs nearly 



