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



A remarkably distinct race of F. erckeli Riipp., differing 

 cliiefly by its paler and greyer colour. It seems to be con- 

 fined to the district round Erkowit. An intermediate race 

 between it and F. erckeli occurs in Eritrea. 



Francolinus icterorhynchns icterorhynchus. 

 Francolimis icterorhynchns Heuglin, J. £. O. 1863, p. 275 : 

 Bongo, E.G.; Butler, Ibis, 1908, p. 259, 1909, p. 89. 



[B. coll.] 1 Pongo river, 1 Chak Chak Feb., 1 Tembnra 

 Mcli., 3 Wau Apl. E.G. 



Francolinus icterorhynchus emini. 



Francolinus icterorhi/nchus emini Neum. Orn. Monatsber. 

 1907, p. 198 : west of Lake Albert. 



[B. coll.] 1 Kajo Kaji Mch. L.E. 



This is a considerably darker form than the typical race, 

 and the heavily marked throat and breast are somewhat 

 reminiscent of the F. clappertoni group. We can find no 

 constant difference in size between the two races. The 

 range of F. i. icterorhynchus extends apparently from the 

 southern Balir el Gliazal to the Shari river, while F, i. emini 

 inliabits Uganda and the southern Lado Enclave. 



Francolinus clappertoni clappertoni. 



Francolinus cliqjpertoni Children, Denham & Clappertou's 

 Trav., App. xxi. 1826, p. 198 : Bornu ; Butler, Ibis, 1905, 

 p. 387. 



[B. coll.] 3 Jebil Melbis Apl. Kor. 



[C. & L. coll.] 1 65 miles N.W. of El Obeid Jan. Kor. 

 (Hon. G. Legge coll.). 



Francolinus clappertoni clappertoni > heuglini (inter- 

 mediate). 



[C. & L. coll.] 2 White Nile lat. 13^° N. Jan. W.N. ; 

 1 Jebelein Jan., 1 30 miles N. of Renk Feb. U.N. 



Francolinus clappertoni heuglini. 



Francolinus clapperto)ii heuylini Neum. O. M. 1907, 

 p. 199 : Meshra el Rek, E.G. 



