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



The word " Sudan/' as used in this part of the paper, 

 means the Anglo-Egyptian Sudan only. 



The following new races are described in this instal- 

 ment : — 



Stigmatopelia senegalensis sudanensis. 

 Turtur afra mearnsi. 

 Ptilopachus petrosus butleri. 

 Ptilopachus petrosus ladoefisis. 

 We had hoped to be able to give, at tlie conclusion of 

 this paper, some remarks on the general relationship and 

 distribution of the Sudanese avifauna, as well as on the 

 migrants both Palfearctic and " Inter-tropical " which occur 

 in the country, but at the moment space ;ind time alike 

 forbid. 



Family Pklecanid^. 



Pelecanus onocrotalus subs p. 



Pelecanus onocrotalus Linn. Syst. Nat. lOtli ed. 1758, 

 p. 132 : Africa ; Reichw. V. A. i. p. 99 ; Butler, Ibis, 1905, 

 p. 381. 



[C. & L. coll.] 3 Kodok Mch. U.N. 



There can be little doubt of the occurrence of typical 

 P. onocrotalus in the Sudan, but the three specimens collected 

 seem decidedly intermediate between that form and the small 

 eastern form P. o. roseus Gmel. They are all females 

 with bills (culmen from tip of feathers) of 310, 3.25, and 

 342 mm. P. o. roseus is also recorded by Heuglin. 



Pelecanus rufescens. 



Pelecanus rufescens Gmel. 8yst. Nat. i. pt. 2, 1789, 

 p. 571: West Africa; Heichw. V. A. i. p. 102; Butler, 

 Ibis, 1905, p. 381, 1908, p. 256. 



Common in the Sudan, though we have no jictual 

 specimens. 



Family Sulid^e. 



Sula leucogaster subsp. ? 



Pelecanus leucogaster Bodd. PI. Enl. 1783, p. 57, No. 973 

 (ex Buff'on) : Cayenne. 



