Mr. R. I. Pocock on Neotropical Scorpions. 93 
with nearly straight 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 conspicucus 
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 ; humerus 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 has 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. 
Fectines short, with from 10-12 teeth, with the lamelle 
of the intermediate series broken up into only a few rounded 
sclerites. 
Stigmata small and slit-like. 
Measurements in millimetres of largest specimen.—'Votal 
length 55, of carapace 7, of tail 34; width of first segment 
5, length 8; length of fifth 7:5, width 4:5; width of bra- 
chium 2°2, of manus 4; length of hand-back 4°8, of movable 
digit 6. 
Loc. Coquimbo, Chili, and Brazil. 
The Museum has four examples in alcohol from Coquimbo 
collected by Dr. Cunningham, one, ticketed Chili, in the 
Ann. & Mag. N. Hist. Ser. 6. Vol. xii. & 
