New South African Scorpions. 7 



first and second segments, similar to those occurring on the sterna ; 

 the groove between the keels more marked in one specimen. 



Palps. All the segments longer ; hands very long and narrow, 

 the length of the hand-back much exceeding the breadth of hand ; 

 the inner part of the upper surface of hand smooth. 



Pectines not reaching beyond middle of the trochanter of fourth 

 pair of legs, with 24 teeth (as in the female !). 



In addition to the differences mentioned for the females, the male 

 of this species differs from that of 0. karrooensis in the upper 

 surface of the hand being moderately convex, especially near the 

 inner edge, instead of flat ; further, the scape of the pectines is not 

 rectangular at the posterior basal angle but rounded off as in the 

 female of karrooensis. 



Measurements in Millimetres. Total length 130 ; greatest length 

 of carapace 22 ; width of carapace 2(H ; distance of eyes from 

 anterior median edge 15 ; width of hand 10 ; length of hand-back 

 15, of movable finger 32|, of tail 80 ; width of first caudal segment 

 7, of fifth caudal segment 5, of vesicle 7. 



Locality. One of the male specimens is labelled " Nisbet Bath 

 [Warrnbad] , Great Namaqualand " (W. Palgrave). The female 

 specimen, which bears no label, was captured with 22 colourless 

 young, to which it had given birth ; one of the young ones is in the 

 animal's mouth, partially devoured. 



OPISTHOPHTHALMUS FLAVESCENS, n. sp. 



Plate II., fig. 3. 



Female (dry). 



Colour nearly uniformly yellow, the mandibles and the tips of the 

 maxillary processes black. 



Carapace large, as broad as long, its length equalling that of the 

 first and second caudal segment together with two-thirds of the 

 third ; interocular area smooth and shiny, finely punctate, strongly 

 convex on each side of the median groove ; anterior edge not 

 emarginate in the middle, crenulated ; sides of the carapace some- 

 what sparsely but not very coarsely granular, the interocular area 

 not bordered laterally by a strip of coarser granules ; median groove 

 smooth, large, not forked anteriorly, widened in front of the median 

 eyes to a large lozenge-shaped hollow, and again, anteriorly, to 

 a narrower but deeper trough-like excavation ; median eyes one- 

 third of the length of the carapace from the posterior border. 



Terga. Segments 1-6 smooth and shiny, finely punctate, 

 minutely granular only at the postero-lateral angles ; segments 



