344 Mr. A. L. Butler on the 



131. Ptyonoprogne rupestris (Scop.). 



I have only seen this Cliff-Swallow on a few occasions, 

 frequenting the rocky hills of the Shabluka Cataract, and 

 always singly. 



Ptyonoprogne obsoleta, so common about the temples on 

 the Nile north of Wadi Haifa, I have not seen within the 

 limits of the Soudan. 



132. Cypsulus apus (Linn.). 



Flocks of the Common Swift may be met with anywhere 

 in the Soudan during the winter months. I have noted them 

 from September 7th to May 30th. 



133. Cypselus affinis Hardw. 

 a. <J. Gedaref, May 25, 1901. 



My specimen was shot from a number which were flying 

 in company with C. apus. This is the only time that 1 have 

 met with the bird in the Soudan. 



134. Tachornis parvus (Licht.). 



The Little Palm-Swift is abundant wherever the " Deleb " 

 (Borassus) palms, in which it breeds, are found. 



135. Caprimulgus europ^eus Linn. 

 a. <J. Khartoum, Oct. 27, 1902. 



The Common Nightjar is abundant about Khartoum in 

 September and October, after which, as is the case with so 

 many of the winter migrants, the great majority pass on 

 further south, repassing in the spring. 



136. Caprimulgus eximius Temm. 

 a. S • Shcndi, March 21, 1901. 



I owe my first introduction to this beautiful Nightjar to 

 Messrs. N. C. Rothschild and Wollaston, who pointed out to 

 me the right sort of ground on which to look for it, and thus 

 helped me to shoot my specimen near their camp at Shendi. 

 In addition to obtaining a splendid series of skins, these 

 gentlemen were successful in finding the eggs of this species, 

 and their account of its habits leaves little to be added. 



This Nightjar will probably prove to be widely distributed 

 in the Soudan where the soil is of red or yellowish sand or 



