and Species of Scorpions. 319. 
It may be at once recognized from the W.-African O. afri- 
canus by its much smaller median eyes and the much greater 
development of the keels on the lower surface of the tail. 
Opisthocentrus levipes, sp. n, 
Most nearly allied to O. 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 ; 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 surtace 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. 
Palp? rather flat; the normal keels coarsely granular, and 
the dorsal intercarinal spaces finely so; hand flatter than in 
validus or africanus 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 africanus or validus. 
Legs smooth and minutely punctulate; the femora of the 
anterior three pairs granular and carinate below. 
FPectines 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 trom the Sheba Mine, Transvaal, 
collected and presented by Dr. W. Percy Rendall. 
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 ........ Lecomtei (Lucas), 
b. Carapace finely granular in parts; pectinal teeth 
a’. Median eyes very large; inferior caudal keels 
GHSOILEECI AM ta std A cietalle le “srcheve “nten orang Neer africanus (Sim.), 
24* 
