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



Irrisor erythrorhynchus (nee Lath.), Butler, Ibis, 1905, 

 p. 352, 1908, p. 243, 1909, p. 85, 1909, p. 401. 



[B. coll.] 4 Roseires ApL Aug. Sept. Sen. ; 4 Wau 

 Jan. & Apl. B.G. 



[Chr. coll.] 3 Mt. Baginzi Mch. B.G. ; 1 Yei Nov. 

 L.E. 



We have followed Claude Grant in his revision of the 

 genus (Ibis, 1915, pp. 281-289), but we should remark iu 

 passing that in our Sudan specimens the size of the tail- 

 spots is not constant, three birds collected by Christy 

 at Mt. Baginzi having very small spots, while the rest 

 of the Bahr el Ghazal birds have large ones. We can 

 see no difference lietween Bahr el Ghazal and Roseires 

 birds. 



Rhinopomastus cabanisi. 



Irrisor cabanisi Do Filippi, Rev. et iMag. Zool. 1853, p. 289 : 

 White Nile, 4° & 3° N. lat. 



Rhinopomastus cabanisi Reichw. V. A. ii. p. 348. 



[B. coll.] 2 Mongalla "summer^' & Jan. ; 1 Rejaf, 

 Feb. L.E. 



A scarce bird [A. L. B.). 



Scoptelus aterrimus emini. 



Scoptelus aterrimus emini Neumann, J. f. O. 1905, p. 197 : 

 Njangabo, W. of Lake Albert. 



Scoptelus notatus apud Butler, Ibis, 1905, p. 353, 1908, 

 p. 242. 



Scoptelus aterrimus apud Butler, Ibis, 1909, p. 85. 



[B. coll.] 1 Disa Apl., 1 Roseires May, Sen. ; 1 El Duem 



Sept. W.N. ; 1 Malakal June, U.N. ; 1 Mongalla, 



" summer,^' 3 Sheik Tombe " summer ^' & Jan. Mon. ; 



1 Raffali Feb., 1 nr. Tonj Jan. B.G. ; 1 Lado Feb. 



L.E. 

 [C. & L. coll.] 7 Kamisa Dec, 2 nr. Sennar Dec. & Jan. 



Sen. ; 1 Jebel Ahmed Agha, 1 White Nile lat. 9|° N. 



long. 30° 40' E. Feb. U.N. 

 •[Chr. coll.] 1 Mt. Baginzi Mch. B.G. 



