Scorpions from Central and South America. 391 



lower surface towards tlie base of the immovable digit 

 granular. Legs smooth. 



Pectinal teeth 7. 



Length 36 millim., of carapace 4*5, of tail 18'5. 



Loc. Brazil. Three female examples in the Museum 

 Collection. 



The species of this genus known to me may be distinguished 

 as follows : — 



a. Lateral margin of distal extremity of tarsus lobate, 



its inferior angle rounded, the terminal spine 

 elevated above the level of the rest, forming a 

 curved series. 

 a}. Immovable digit of hand normally curved, 



inner border of hand more strongly produced ; 



sculpturing of hand a reticulated pattern of 



ridges ; upper surface of humerus flat, with 



strong anterior keel ; frontal lobes not 



coarsely granular ; tergites with a few large 



coarse granules amongst the tine granulation ; 



latei'al margins of caudal segments straight 



or nearly so ; infero-lateral caudal crests not 



strongly converging ; pectinal teeth 12-14 . . Whitei, Ger., S • 

 6'. Immovable digit much straighter, inner edge 



of hand Jess strongly produced ; sculpturing 



of hand more granular ; area at base of digits 



distinctly granular ; upperside of humerus 



convex, with weak anterior crest ; frontal 



lobes coarsely granular ; tergites without 



distinct coarse granules, but very rough with 



tine close-set granulation ; caudal segments 



with rounded convex sides ; infero-lateral 



caudal crests strongly converging posteriorly ; 



pectinal teeth 10 rectimanus, sp. n., S . 



b. Lateral margin of distal extremity of the tarsus 



nearly straight, the lower angle squared or 

 acute, the terminal spine in the same straight 

 line with the rest { cJ $ ) . 

 a^. Caudal segments with relatively weak keels, 



the median inferior keels obsolete on the 



third and fourth segments, strong but not 



granular upon the first and second, median 



lateral keel weak, though just visible upon 



the second, third, and fourth segments ; 



vesicle not granular ; cuticle of trunk, legs, 



chelae, and tail densely and finely punctured, 



less closely so on the sterna and coxae ; five 



spines on each side of the posterior tarsi .... cmtiUajius, Poc, $ . 

 b^. Caudal segments strongly keeled, the inferior 



four keels strong and granular upon the firat, 



second, and third segments, traceable by 



granules on the fourth, median lateral keel 



strong on the first and second segments and 



visible on the third ; vesicle "rrauular. 



