100 Mr. R. I. Pocock on Neotropical Scorpions. 
Sterna smooth, polished, punctured. 
Tail less than five times the length of the carapace, mode- 
rately robust; the second and third segments wider than 
long, the fourth slightly longer than wide, the fifth as wide as 
the second; the vesicle as wide as the fifth ; the upper surface 
mesially narrowly sulcate, finely granular on the first and 
second; the superior and supero-lateral keels irregularly 
granular ; the sides of the segments also irregularly granu- 
lar; the lower surface of the first smooth (with four punc- 
tures), of the second, third, and fourth rather obscurely 
keeled, the keels stronger on the fourth than on the third, and 
on the third than on the second, all of them irregularly 
granular or subtubercular ; the fifth segment with its upper 
surface flat behind, the edges squared and irregularly rough- 
ened, with traces anteriorly of a superior lateral keel; the 
inferior lateral keels, as stated above, entirely obsolete, unless 
they are represented by a series of granules on each side of 
and close to the median granular keel ; the lateral part of this 
segment coarsely granular; the vesicle and aculeus longer 
than the fifth segment and as wide, the aculeus not half as 
long as the vesicle, which is granular beneath. 
Falpi smooth, not keeled nor granular, studded with large 
piliferous tubercles ;_ manus wider than the brachium, rounded, 
subcostate, the length of the hand-back less than that of the 
movable digit, but considerably more than the width of the 
hand; the median teeth of the digits forming a single series, 
which is slightly curved on a level with the teeth of the 
external row. 
Legs quite smooth; the lower surface of the feet furnished 
with from three to four pairs of spines, which terminate 
distally in longer slender hair-like points. 
Fectines yather short, furnished with ten teeth; the inter- 
mediate series of lamella about 6 or 7 in number. 
Stigmata small and slit-like. 
Measurements in millimetres.—Total length 33, of tail 18, 
of carapace 4; width of first caudal segment 2°6, of fifth 2-2. 
Loe. ? 
A single example, ticketed “? W. coast of Africa,” and 
named Cercophonius chilensis, Molina, belonging to the collec- 
tion of the late Count Keyserling. There can be very little 
doubt that this is also a Neotropical form. 
UROPHONIUS, gen. noy. 
(Pl. VI. A. figs, 14, 142.) 
Closely allied to Cercophonius. 
The median series of teeth on the digits of the chele of 
larger size and set in two irregular rows. 
