250 Mr. R. I. Pocock on a new Scorpion. 



Fiy. 3 a. Otostiyma nudum, sp. n. Head from below. 



Fiy. 3 b. Ditto. Anal somite from below. 



Fiy. 4. Himantarium (?) striatum, sp. n. Head from above. 



Fig. 4 a. Ditto. Head from below. 



Fiy. 4 b. Ditto. Aual somite from below. 



XXXVIII. — Description of a new Genus and Species of Scor- 

 pion belonging to the Group Jurini. By R. I. POCOCK, 

 of the British Museum (Nat. Hist.). 



[Plate XI. B, figs. 1-1 c] 



Uromachus, gen. nov. 



Sternum pentagonal, longer than wide. 



Movable and immovable dactyli of the chelicera3 armed 

 with three strong teeth above, and with a series of similar 

 tubercular teeth below. 



Hands distinctly costate. 



Cephalothorax with anterior margin truncate ; ocular 

 tubercle not divided. 



Stigmata circular. 



Vesicle of tail elongate, about as long as the fifth segment, 

 almost parallel-sided, not globular ; slender at its anterior 

 end, flattened beneath ; aculcus very short, about one fifth of 

 the length of the vesicle, stout in its anterior half, its poste- 

 rior half becoming abruptly spiniform. 



This genus is closely allied to Chcerilus of Simon, and 

 may only be separated from it by the remarkable form of the 

 caudal vesicle. The vesicle is somewhat elongate in Chcerilus, 

 but in this new species it is so totally different in shape 

 from that of any other Scorpion, that I have thought the 

 peculiarity worthy of generic distinction. Is it a sexual 

 character ? 



Uromachus pictus, sp. n. (PI. XI. B, figs. 1-1 c.) 



Colour reddish brown, variegated with black. 



Cephalothorax. — Anterior border almost straight, very 

 slightly emarginate ; the sides abruptly sloped at an angle 

 from the median portion ; the ante-ocular area nearly flat, 

 slightly hollowed anteriorly and smooth, the post- ocular area 

 deeply marked by the median sulcus, which is continuous in 

 front with a hollow on each side of the ocular tubercle, the 

 sides of the sulcus distinctly granular ; the tubercle situated 

 well in the anterior half of the cephalothorax, not sulcate but 

 prolonged in front and behind into a short tapering process ; 



