Mr. R. I. Pocock on Neotropical Scorpions. 91 
middle, the grooves behind, in front of and at the sides of the 
ocular tubercle, rather deep; the whole of the upper surface 
studded with rounded tubercles, the median eyes small, the 
distance between them greater tian a diameter; the distance 
between the two principal lateral eyes about equal to a 
diameter, a minute third eye situated above and behind the 
posterior large eye. 
Tergites polished, obsoletely granular or tubercular behind, 
the last more distinctly granular, with two posterior tubercles 
on each side. 
Sterna entirely smooth, punctured. 
Tail rather robust, narrowed posteriorly, the segments with 
nearly straight parallel sides, the second a little wider than it 
is long, the fourth segment nearly flat above, those in front 
- of it shallowly suleate ; the superior and supero-lateral keels 
strongly developed, granular, with a prominent posterior 
tooth ; the upper surface of these segments granular at the 
sides, the first segment also granular in the middle; the first 
and second segments neither keeled nor granular below, 
smooth and punctured, the third also almost entirely smooth 
below, only very obsoletely keeled and lightly rugulose; the 
fourth more distinctly keeled and irregularly tubercular, with 
a distinct inferior lateral keel; the fifth segment flat and 
weakly granular above, with squared granular edges, a 
distinct granular median lateral keel in the anterior half of 
the segment, the three inferior keels distinct and subdenti- 
culate, the spaces between them granular, the segment more 
than twice as long as wide; the veszcle large, wider than the 
fifth segment, smooth and mesially grooved above, some- 
what coarsely punctured below and at the sides, impressed at 
the base of the vesicle, which is long, nearly straight, and 
curved in its distal half. 
Palpi robust, thickly and coarsely granular above, with 
the normal keels developed; the brachiwm without the 
superior tooth on its anterior surface; manus robust, carinate 
above and below, the carinz studded closely with granules, 
which extend on to the intercarinal spaces; the upper surface 
convex, the width of the hand almost equal to the length of 
the hand-back and rather greater than the height of the hand, 
the length of the movable digit considerably greater than that 
of the hand-back. 
Femora of the legs finely and closely granular, the rest of 
the segments nearly smooth. 
Pectines furnished with 5-6 teeth. 
Measurements in millimetres.—Total length about 54, of 
carapace 8°d, of tail about 29; width of first segment 3°9, of 
