100 Mr. E. 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 tlian 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 rather short, furnished with ten teeth ; the inter- 

 mediate series of lamellae 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. 



Loc. ? 



A single example, ticketed " ? W. coast of Africa," and 

 named Cercojjhonius chilensis, Molina, belonging to the collec- 

 tion of ihe late Count Keyserling. There can be very little 

 doubt that this is also a Neotropical form. 



UeophoniuS; gen. nov. 

 (PI. VI. A. figs. 14, 14 a.) 

 Closely allied to Cercophonius. 



The median series of teeth on the digits of the chelae of 

 larger size and set in two irregular rows. 



