98 Mr. R. I. Pocock on Neotropical Scorpions. 
Carapace smooth and highly 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 tubercular 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 
seement similarly but less strongly keeled below, the third 
and fourth not keeled below; the upper edges of the 
fifth squared granular in front, but the lower surface 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 ; manus moderately robust, its width about two 
thirds the length of the movable digit, about twice the width 
of the brachium; 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 witha single 
row of stoutish curved stiff sete, 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. 
Pectines moderately long, furnished with 12-14 teeth. 
Stigmata small and oval. 
Measurements in mitlimetres.—Total length 45, of cara- 
pace 5, of tail 25; width of second segment of tail 3;. width 
of brachium 13, of manus 8+; length of hand-back 3°8, of 
movable digit 4°8. 
d+ 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 
