1919-] ^^*^ Birds of the Anglo-Eyyptian Sudan. 653 



Ruwenzoii, collected by Blaine in February, wing 219 mm., 

 which we are also inclined to assign to the present race, 

 lluwenzori is the type-locality of M. m. maximus O. -Grant, 

 but this is a very much larger and darker resident form. 



Micropus affinis. 



Cypselus affinis Gray & Hardw. III. Tnd. Zool. i. 1832, 

 pi. 35. fig. 2 : India. 



This species, which ranges throughout India and Africa, 

 must no doubt occur in the Sudan, and Heuglin records it 

 from eastern Sennar, but we are not certain as to whether 

 it is this species or M. horus that is referred to, since 

 Heuglin considered the latter a variety of M. affinis. 



Micropus horus. 



Cifpselus hums [Hartl. & Finsch in MSS.] ; Salvad. & 

 Antin. Atti R. Accad. Torino, viii. 1872, p. 94: Wad 

 Medani, Blue Nile. 



Apus horus (Salvad. & Antin.) ; Reichw. V. A, ii. p. 381. 



[C.& L. coll.] 1 Blue Nile, 20 miles above Sennar, Sen. 



This specimen, a female of small size, wing 143 mm., 

 against 153 given for the type by Salvadori, comes from 

 close to the type-locality, and is the first specimen received 

 by the Museum from the Sudan. This species is dis- 

 tinguished from Micropus coffer streubeli by the shortness 

 of its tail. 



Micropus caffer streubeli. 



Cypselus streubeli Hartl. J. f. O. 1861, [). 418 : Keren 

 {vide Heuglin, ibid. p. 422). 



Apits streubeli (Hartl.) ; Keichw. V. A. ii. p. 381. 



Cypselus affinis nee (iray & Hardw., Butler, Ibis, 1905, 

 p. 342. 



[B. coll.] 1 Gedaref June, Kas. ; I Rejaf Apl. L.E. 



Mr. Butler apparently did not distinguish between this 

 Swift and the true M. affinis without a forked tail, so we 

 are unable to say anything of its distribution. 



This form has a strongly forked tail, thus differing from 



