1918.] the Birds of the Anglo-Bgyptian Sudan. 649 



pp. 131-5), from Ton^ia in the Upper Nile Province, is 

 notliing but C. /. marginata in summer dress. 



Cisticola cheniana simplex. 



Dryinoeca simplex Heuglin, Ibis, 1869, p. 105 : Bahr el 

 Djebel, i.e. Upper Wliite Nile between Lado and Lake No. 



Cisticola ladoensis Hartlaub, Abliandl. nat. Ver. Bremen, 

 viii. 1882, p. 189 : Lado. 



[B. coll.] 11 Mongalla May-Sept., 1 Bor May, 1 Kenisa 

 Jan. Mon, ; 1 Rejaf Feb. L.E. 



[Chr. coll.] 1 Yei Nov. L.E. 



These Grass-Warblers from the sudd district of the 

 upper White Nile are undoubtedly identical with a bird 

 collected by Emin at Lado, which we may regard as a 

 co-type of Hartlaub^s species. It belongs to the group 

 widely spread over eastern and southern Africa usually 

 placed under the specific name subruficnpilla or cheniana, 

 but we believe that the true C subruficapiUa of western Cape 

 Colony is distinct specifically and prefer to use cheniana. 



Neumann (J. f. O, 1906, p. 267), who has examined the 

 types of Heuglin's D. simplex, believes that it is identical 

 with C. ladoensis Hartl., and that it was founded on a young 

 female, which accounts for the discrepancy in the vving- 

 measureraent^ which is given by Heuglin as 1 inch 11 lines, 

 which is approximately 50 mm., the measurement given 

 by Reichenow (Vog, Afr. iii. p. 547). Males in the Butler 

 collection average 65 mm., females 5o mm. 



We suspect that (Cisticola subruficapiUa borea Mearns, 

 Smiths. Misc. Coll. Ivi. No. 25, 1911, p. 3: Rhino Camp, 

 Lado Enclave, is a synonym. 



Cisticola aridula. 



Cisticola aridula Witherby, Bull. B. O. C. xi. 1900, p. 13 : 

 Gerazi, 60 miles S. of Khartoum. 



[C. & L. coll.] 6 from 13|° to 15° N. lat. on White Nile 

 Jan. W.N. 



Up to the present time the type of Witherby^s C. aridula 

 has remained unique, with the exception of an example col- 



