On Scorpions and Solifugce from tJie Sudan. 217 



A broad silvery band taperiiiG: on the caulal peduncle, 

 continued to end of middle caudal rays. No humeral or 

 caudal spots. 



XXV. — Scorpions and Solifugce colltcted hy Captain S. S. 

 Flower in the Anglo-Egyptian Sudan. By kS. Hiest. 



(Published by permission of the Trustees of the British Museum.) 



Scorpions. 

 Buthus citrimis, II. & E. 

 Loc. Wady Haifa. 



Buthus acKtecarinatus, Sim. 



Loc. Khartoum and the Senaar Province; in the Britisli 

 Museum collection there are j)resent also examples from 

 Atbara {Dr. S. K. Maloiif), and from Thebes and Ghizeh 

 (6'. S. F.) in Egypt. 



Buthus minax, L. Koch. 



Loc. Captain Flower collected examples of this species at 

 Khartoum ; the mouth of the Finder River ; Senaar and 

 Koseires. There are also specimens in the British Museum 

 collection from Abyssinia. 



Eemarhs. — The male of Buthus * minax differs from that of 

 B. emini., Poc, principally in the structure of the tail, the 

 upper keels of which are very much weaker, the lateral ones 

 being exceedingly weak or absent in segments 2-4 ; more- 

 over, the upper keel of the fittii caudal segment is represented 

 by onl^ a very short series of granules and the intercarinal 

 spaces of the caudal segments are not nearly so strongly 

 granular as is the case in B. emini. 



In the male of B. emini, on the other hand, segments 1-4 

 of the tail are each furnished with ten well-deiiDed granular 

 keels, the upper and lateral keels being quite distinct and 

 composed of separate granules, which show no tendency to fuse 

 with one another ; the tilth caudal segment has a well-marked 

 upper keel, which runs the entire length ol the segment. 



[Buthus poJystictus, Poc., is very closely allied to B. minax 

 and B. emiui, and Prof. Kraepelin f believes that it is only 



* Birula's observations on Buthus minax and its allies (Sitz. Ber. Ak. 

 VViss. cxA'ii. p. 141, 1908) should be consulted, 

 t Zool. Jabrb. (iSyst.) xviii. p. 560 (1903). 



