640 Messrs. Sclater and Mackworth-Praed on [This, 



[Chr. coll.] 3 Yambio Mch. B.G. 



This species is new to the Bahr el Ghazal ; it was pre- 

 viously known to range to Uganda and the Welle river. 



Nilaus afer afer. 



Nilaus afer (Lath.) ; Sclater in Shelley's B. A. v. p. 456 ; 

 Butler, Ibis, 1905, p. 329, 1908, p. 226, 1909, p. 80. 



[B. coll.] 3 Roseires Aug. Sept. Sen. ; 2 nr, Fatasha 



Jan. Kh.; 1 Jebel Melbis Apl. Kor. ; 1 Khor Filus 



June, TJ.N. ; 4 Mongalla Jan. and summer, 6 Sheik 



Tombe summer, Mon. ; 1 Moyen Jan., 1 Chak Chak 



Feb., 2Wau Apl. B.G. 

 [C. & L. coll.] 1 Singa, 6 Kamisa Dec, 1 nr. Sennar 



Jan. Sen. ; 1 Kosti Jan. W.N. ; 1 nr. Lake No Feb. 



U.N. 

 [Chr. coll.] 1 Meridi Feb., 2 Yambio Mch., 1 Wau 



July-Aug. B.G. 



Family Prionopid^e. 



Eurocephalus riippelli riippelli. 



Eurocephalus rueppelli Bp. ; Sclater in Shelley's B. A. v. 

 p. 447. 



[B. coll.] 9 Mongalla July-Sept. 



In the J. f. O. 1915, pp. 46-50, Count Zedlitz gives an 

 interesting review of the races of this Siirike. We ourselves 

 are inclined, however, to consider E. anguitimens as specific- 

 ally distinct. 



As regards the northern forms, E. r. riippelli from the 

 upper White Nile is distinguished by its somewhat — at 

 certain times of year considerably — paler upper parts and at 

 all times by the small amount and paleness of the brown on 

 the underside. 



E. r. erlangeri from Abyssinia and northern Somaliland is 

 distinguished by its darker upper parts and the larger and 

 darker brown marks on the underside. 



E. r. bohmi from western German East Africa and Lake 

 Nyasa is considerably paler on the back, more like E. r. 



