Mr. R. I. Pocock on Neotropical Scorpions. 93 



with nearly straif^lit parallel sides ; the first segment about 

 twice as wide as long, the third a little wider than long, the 

 fourth longer than wide, the fifth less than twice as long as 

 wide ; the upper surface of the tail smooth, moderately exca- 

 vated, the superior keels marked by a series of rounded 

 tubercles, the superior lateral keel granular on the first 

 segment, and represented on the second, third, and fourth in 

 front by a small shelf-like process and behind by a single 

 tubercle; the first segment coarsely granular at the sides and 

 below, the granules on the lower surface arranged in four 

 longitudinal posteriorly converging rows or keels ; the second 

 segment nearly smooth and polished at the sides, granular 

 and keeled beneath like the first ; the third and fourth seg- 

 ments smooth and polished laterally and below, sparsely 

 punctured, without trace of keels ; the fifth segment with its 

 upper surface widely excavated behind, the sides granular in 

 front, smooth and punctured behind, the lateral surface smooth 

 and punctured, smooth in front, thickly punctured behind ; 

 the median keel just visible, the lateral keels absent in front, 

 granular behind. Vesicle large, much wider than high, 

 nearly as wide as the fifth segment, with a very conspicuous 

 process on each side at the base, smooth and nearly flat above, 

 thickly and finely granular beneath, the aculeus very short 

 and slightly curved. 



Palpi robust, of median length ; Jmmerus coarsely granular 

 in front and above at the base ; brachium above, behind, and 

 below smooth, polished, not carinate, the anterior surface very 

 finely granular and bounded above and below by a series of 

 larger granules, one of which in the upper series lias the form 

 of a sharp tubercle ; manus much wider than the brachium, 

 rounded, entirely smooth and polished, punctured but not 

 granular; digits short, the movable a little shorter than the 

 carapace and a little longer than the hand-back. 

 Legs finely granular in front, 



Pectines short, with from 10-12 teeth, with the lamellte 

 of the intermediate series broken up into only a few rounded 

 sclerites. 



Stigmata small and slit-like. 



Measurements in millimetres of largest specimen. — Total 

 length 55, of carapace 7, of tail 34 ; width of first segment 

 5, length 3; length of fifth 7-5, width 4*5; width of bra- 

 cliium 2-2, of manus 4; length of hand-back 4*8, of movable 

 digit 6. 



Loc. Coquimbo, Chili, and Brazil. 



The Museum has four cxan)ples in alcohol from Coquimbo 

 collected by Dr. Cunningham, one, ticketed Chili, iu the 

 Ann. db Mag. N. Hist. Ser. 6. Vol. xii. 8 



