706 Messrs. Sclater and Mackwortli-Praed on [Ibis, 



Erlanger (J. f. O. 1904, pp. 150-152) divides this species 

 into several races. We have not sufficient material in the 

 Museum to confirm or dispute his conclusions. Apparently 

 not an uncommon bird in the Sudan. 



Torgos tracheliotus nubicus. 



Vultur nubicus H. Smith in Griffith's Animal Kingdom, 

 i. 1829, p. 164: Nubia. 



Otogyps auricularis (uecDaud.), Butler, Ibis, 1905, p. 370. 



Otogyps auricularis pt. Reichw. V. A. i. p. 512. 



[C. & L. coll.] 1 Sennar Jan. 



Not uncommon in the Sudan, but like all large Vultures 

 not much sought after by collectors. 



The generic name Torgos Kaup, Isis, xxi. 1828, p. 1144, 

 is far anterior in date to Otogyps and must be accepted in 

 its place. The specific name tracheliotus (J. R. Forster in 

 Lev.iillant's ' Reise Afrikas,' iii. 1791, p. 362, pi. 12) also 

 antedates auricularis Daudin, 1800, as has been pointed out 

 by Richmond (P. U.S. Nat. Mus. xxxv. 1909, p. 646). 



The entire absence of ear-lappets in all the north-east 

 African examples appears to be quite sufficient to distin- 

 guish them from South African birds. We have no 

 examples before us from East Africa. 



Lophogyps occipitalis. 



Vultur occipitalis Burchell, Travels, ii. 1824, p. 329 : 

 Makhwari Uiver, nr. Kuruman, Bechuaualand. 



Lophogyps occipitalis Reichw. V. A. i. p. 514 ; Butler, 

 Ibis, 1908, p. 254. 



[C. & L. coll. J 3 Kamisa Dec. Sen. ; 1 Jebelein Jan. 

 W.N. ; 1 Tonga Feb. U.N. 



A species occurring throughout the greater part of the 

 Sudan. 



Neophron percnopterus percnopterus. 



Vultur j)(!'f'^nopterus Linn. Syst. Nat. 10th ed. 1758, 

 p. 87 : Egypt. 



Neophron percnopterus Reichw. V. A. i. p. 521 ; Butler, 

 Ibis, 1905, p. 371, 1908, p. 254, 1909, p. 402. 



