Scorpions from Central and South America. 393 



black, a continuous pale band on the median dorsal area of 

 the tergites ; femora and tibife of legs variegated ; sides and 

 lower surface of tail lined with black. 



Carapace finely granular, frontal portion smooth. Tergites 

 finely granular ; the last more coarsely, with two granular 

 crests on each side. Sterna smooth, finely punctulate, the 

 last granular in the middle posteriorly. Tail of normal 

 thickness, nearly parallel-sided ; superior and supero-lateral 

 keel present and granular on segments 1—3, the superior also 

 traceable on segment 4, the lower side of segments 1 and 2 

 coarsely granular, the granules arranged along the four crests, 

 those in the middle irregularly disposed ; the inferior lateral 

 crests very weak on the second segment; third and fourth 

 segments smooth laterally and below, without crests; fifth 

 segment with three inferior granular keels extending along 

 the posterior two-thirds of the segment, the area between 

 them irregularly granular in its posterior half; vesicle finely 

 granular laterally and below, as wide as segment 5. 



Chelce : humerus weakly granuhir and keeled above at the 

 base and in front ; brachium and hand smooth, not keeled, 

 punctured ; hand slender, a little wider than brachium, nar- 

 rower than vesicle, its width considerably less than half the 

 length of the movable digit, the median teeth of which are 

 arranged in two irregular rows only in the basal half. 



Legs with femora externally finely granular, especially on 

 third and fourth pairs; tarsus 4 with 6 — 6 spines, tarsus 3 

 with 5 — 5 spines, tarsus 2 with 2 — 2 spines, tarsus 1 with 

 1 — 1 spines. 



Pectinal teeth 17 ; apices of each half of genital operculum 

 rounded. 



Measurements in millimetres. — Total length 33"5; length of 

 carapace 4*3, of tail 19"5; width of vesicle 2, of hand I'o, of 

 brachium 1*3 ; length of movable digit 4. 



Exact locality doubtful, probably Chili, the specimen being 

 contained in a tube with examples of Bothriurus coriaceus, a 

 species which has been recorded from Coquimbo, &c. 



The female of this species may be recognized from tliat of 

 hrachycentrus (^=iJheringii^ Poc.) by the following features : — 



a. Third segment of tail entirely smooth and keel- 

 less below, smooth tuberclesor granules on lower 

 side of first segment ananged in four longi- 

 tudinal lines, the medians more coarsely and 

 irregularly granular ; second segment with 

 two in-egular rows of rounded tubercles below ; 

 superior crests present and gi-anular on seg- 

 ments 1-4, supero-lateral present and granular 



