2 HiKST, Collection of Ai-aclniida (uuf Chilopoda 



2. Parabuthus truculentus, sp. n. 



Carapace granular throughout ; superciliary ridges of 

 oculartubercle smooth, but the groove between them 

 weakly granular. 



Tcrgites of abdomen very finely granular anteriorly, 

 the granulation of the posterior part of them much coarser 

 but not very coarse. First stcriute finely granular at the 

 sides but smooth in the middle ; sternites 2-4 with fine 

 granulation at the lateral margins only ; last sternite 

 distinctly granular at the sides but only very weakly and 

 sparsely granular in the middle ; it has four keels, the 

 outer ones being granular but the middle ones smooth. 



Tail. In the central part of the stridulatory area of 

 the first segment the granules are fused to form transverse 

 ridges, which are especially well developed in the posterior 

 half In the second segment the ridges occupy practically 

 the entire breadth of the long and narrow stridulatory 

 area, and nearly all of them are quite continuous and 

 uninterrupted. Intercarinal sj^aces distinctly granular. 

 Segments 1-4 each with ten granular keels, and the 

 granules of which they are composed are not exception- 

 ally large ; it is only in the posterior half, however, that 

 the median ventral keels become distinctly granular, [See 

 the comparison between this new species and the one 

 from the Kalahari desert below.] Median lateral keel of 

 the fourth segment fully developed ; superior keel weak 

 in its posterior half in the third and fourth segments ; 

 median ventral keels of the fourth coming to an end at 

 some distance from the posterior end of the segment. 

 Superior keel of fifth caudal segment present only in the 

 anterior third, and consisting merely of three strong 

 granules and a short series of weak granules ; in the 

 posterior two-thirds of this segment there is no trace of 



