and Species of Scorpions. 319 



It may be at once recognized from the W.- African 0. afri- 

 canus by its much smaller median eyes and the much greater 

 development of the keels on the lower surface of the tail. 



Opisthocentrus Icevipes, sp. n. 



Most nearly allied to 0. validus, Thor. 



Colour olivaceo-ochraceous ; palpi more ferruginous ; legs, 

 lower surface, and vesicle pale ochraceous. 



Carapace rather flat, finely punctured throughout, and 

 finely granular behind at the sides and in front of the ocular 

 tubercle; the anterior excision rather shallow; the frontal 

 lobes not so triangular as in validus j eyes as in that species. 



Trunk smooth, minutely punctured throughout ; the last 

 wrinkled ; sternites also smooth and minutely punctured, the 

 last furnished with a shallow groove. 



Tail of the ordinary form, less than three times the length 

 of the carapace, which is as long as the first two segments and 

 half the third ; its upper surface mesially grooved, weakly 

 granular at the sides, but scarcely carinate except on the 

 fourth ; lateral surface smooth, punctulate, with an obsolete 

 keel ; the inferior surface distinctly keeled, the keels granular 

 on the fourth, denticulate on the fifth ; vesicle compressed, 

 serially granular below. 



Palpi rather flat ; the normal keels coarsely granular, and 

 the dorsal intercarinal spaces finely so ; hand flatter than in 

 validus or ofricanus and much smoother, the reticulated 

 pattern finer and much less deep ; hand-back considerably 

 longer than the width of the hand, of which the inner border 

 is lightly convex and coarsely and sharply tubercular; digits 

 moderately long, the immovable more strongly bent at the 

 apex than in ofricanus or validus. 



Zf<76' smooth and minutely punctulate; the femora of the 

 anterior three pairs granular and carinate below. 



Pectines furnished with eight teeth. 



Measurements in millimetres. — Total length 97, of cara- 

 pace 15, of tail 43'5 ; width of brachium 5"5, of hand 10*5; 

 length of hand-back 13, of movable digit 14. 



A single female example from the iSheba Mine, Transvaal, 

 collected and presented by Dr. W. Percy Kendall. 



The following synopsis of the African members of this 

 genus will show some of the characters of the species recog- 

 nized by me : — 



a. Carapace smooth ; pectinal teeth 10-12 Lccomtei (Lucas). 



b. Ciinipace tinelv granukr m parts; pectinal teeth 



6-8. 

 a\ Median eyes very large; inferior caudal keels 



obsolete ofricanus (8iui.), 



24* 



