1918. J the Birds of the Anglo Egyptian Sudan. 713 



Nearest E. I. teresita but a much brighter blue above ; 

 below, the throat and chest are also bright blue instead of a 

 dull greyish blue as in E. I. teresita. The white of the 

 abdomen is both clearer and more sharply defined. Wing, 

 64 to 68 mm. 



Type, a male collected by W. J. Ansorge at N'Dalla 

 Tando, in northern Angola, 7/viii./1908. B.iVJ. reg. no. 

 1910/5/6/542. 



We regard Elminia albicauda Boc, ranging from Ben- 

 guella to Nyasaland, as a distinct species. 



Family HiRUNDiNiDiE. 



Delichon urbica urbica. 



Hirundo urbica urbica Linn, ; Hartert^ Vog. pal. Faun, 

 p. 807. 



Hirundo urbica Butler, Ibis, 1905, p. 343, 1909, p. 399. 



[B. coll.] 2 Khartoum Apl. 



One of these birds, both of which are males, reaches the 

 quite exceptional wing-measurement of 116 mm.; the other 

 is normal, being 111 mm. 



Common on passage in autumn and spring from Khar- 

 toum to Lado (^A. L. B.). \ 



Riparia riparia riparia. 



Riparia riparia riparia (Linn.) ; Hartert, Vog. pal. Faun, 

 p. 811. 



Cotile ripay-ia (Linn.) ; Butler, Ibis, 1905, p. 343, 1908, 

 p. 237, 1909, p. 399. 



[B. coll.] 1 Khartoum Apl. 



Throughout the Sudan in winter {A. L. B.). 



Riparia riparia littoralis. 



Cofyle littoralis Heuglin, Orn. N.O.-Afr. i. 1869, p. 166 ; 

 Dougola. 



Riparia riparia littoralis (Heugl.) ; Hartert, Vog. pal. 

 Faun. p. 812. 



