New South African Scorpions. 11 



Male (recently killed, in alcohol) . 



Differential characters : 



Carapace as long as the first two caudal segments together. 



Tail robust. 



Sterna. First four segments minutely granular at the lateral 

 borders ; fifth segment granular throughout, usually with coarser 

 granulation at the sides, in the middle sometimes rugose or even 

 nearly smooth, keels as in the female. 



Palps. Upper anterior crest of humerus distinct, composed of a 

 row of coarse granules ; hands very pilose, much slenderer than in 

 the female, the fingers very long ; inner part of the upper surface of 

 hand nearly flat, often concave distally, covered with low coarse 

 granules, which may, however, almost disappear, except along the 

 inner border ; the two secondary keels always very distinct, com- 

 posed of rows of coarse black granules ; inner edge of hands 

 denticulate. 



Opcrculum transversely oval or rhomboidal, much broader than 

 long, completely cleft longitudinally. 



Pcctines with 17-20 teeth, rectangular at the base behind and 

 therefore toothed along the whole length of scape. 



Measurements in Millimetres. Total length 93 ; greatest length of 

 carapace 12 ; width of carapace 11| ; distance of eyes from anterior 

 median edge 8 ; width of hand 8 ; length of hand-back 64-, of 

 movable finger 17, of tail 53 ; width of first caudal segment 6, of 

 fifth caudal segment 4^. 



Locality. Two females and two males from Schlanghoek, Wor- 

 cester Div. (B. Francke). 



Four females and one male from the Winterhoek Mountains, 

 Tulbagh Div. (Dr. Kolbe, F. Treleaven, E. M. Lightfoot, and my- 

 self). 



Three females and four males labelled " "Witzenberg Mountains," 

 Tulbagh Div. (T. H. Kleinschmidt) ; characterised by the stronger 

 crenulation of the inferior keels in the first caudal segment, and by 

 the smoothness of the inner part of the upper surface of the hand in 

 the male. 



This scorpion constructs deep burrows in the earth, but it also 

 lives under stones. It is very closely related to 0. maccr, cliapcri, 

 and probably also to intcrmedius. The coloration is almost exactly 

 that of 0. macer, Thor., although the humerus and brachium in the 

 latter are not so darkly coloured; further, in the structure of the 

 cauda with its well-developed, blackened, inferior keels, in the pro- 

 portions and structure of the hands in both sexes, in the granulation 



