98 Mr. K. I. Pocock 07i Neotropical Scorpions. 



Carapace smooth and liiglily polished, only very feebly 

 granular laterally, its anterior border lightly emarginate, the 

 ocular tubercle just in front of its middle. 



Tergites polished, very finely and closely granular postero- 

 laterally and mesially, the last furnished with four abbre- 

 viated lubercular keels. 



Sternites smooth, the last with four smooth abbreviated 

 keels. 



Tail about five times the length of the carapace, parallel- 

 sided from the second segment, the third segment a trifle 

 wider than long, the fourth a trifle longer than wide ; the 

 upper surface of the tail smooth, the superior and supero- 

 lateral keels present on the anterior three segments, but 

 smooth on the second and third ; the lower surface of the 

 first furnished with four smooth keels, the internal of which 

 are furnished with a single large setiferous pore ; the second 

 segment similarly but less strongly keeled below, the third 

 and fourth not keeled below ; the upper edges of the 

 fifth squared granular in front, but tlie lower svirface of the 

 fifth with a weak median posteriorly granular keel, the lateral 

 obliquely curved series of granules not completely circum- 

 scribing the normal area, which is granular in the middle. 

 Vesicle thickly granular beneath, smooth and flat above, not 

 quite as wide as the fifth segment. 



Palpi very smooth and polished, scarcely granular, and 

 not carinate ; manns moderately robust, its width about two 

 thirds the length of the movable digit, about twice the width 

 of the brachium 5 the hand-back a little shorter than the 

 movable digit. 



Legs smooth and polished, the penultimate segment fur- 

 nished with a few spines, the feet adorned below with a single 

 row of stoutish curved stiff seta?, those of the first pair not 

 spined beneath, those of the second pair having a single pair 

 of spines, while the third and fourth have three pairs of 

 spines. 



Fectines moderately long, furnished with 12-14 teeth. 



Stigmata small and oval. 



Measurements in millimetres. — Total length 45, of cara- 

 pace 5, of tail 25 ; width of second segment of tail 3 ,• width 

 of brachium 1-^, of manus 3 + ; length of hand-back 3*8, of 

 movable digit 4"8. 



$ . Distinguished by very well-marked sexual characters. 



The upper side of the body and palpi are not smooth and 

 highly polished, but finely and closely granular. The tail is 

 a little more robust and is narrowed posteriorly ; the vesicle 

 is much narrower and much smoother beneath than in the 



