Species of Opisthoplithalmus. 179 



the sides with coarser gramilation). 

 Inferior caudal keels quite smooth in an- 

 terior segments, not granular, at most 

 interrupted by pits. Ventral surface 

 of last abdominal segment smooth in 

 the middle, rarely very finely granular. 

 (Hands more or less yellow, with 4 

 black very strong keels above.) Southern 

 Divisions of Cape Colony, Zululand 

 (Pocock) <? O. maccr, Thor. 



6 1 '. Interocular area partly or wholly 

 covered with the finest dust-like granu- 

 lation, which is not coarser than that 

 at the hind angles of carapace. In- 

 ferior keels in anterior caudal segments 

 more or less granular. Ventral sur- 

 face of last abdominal segment finely 

 granular in the middle. (Hands almost 

 black above, with strong or weak 

 secondary keels.) Albany Division . . 

 3 0. latimanns, C. Koch. 



6' 6 . Operculum fused to a single piece along median 

 line, without stylets. (Females.} 



a-. Inferior median crests of segment 1 and gene- 

 rally also of segments 2-4 of cauda distinctly 

 defined only on the lateral side, the space 

 between them being more or less filled up and 

 covered with a number of coarse or weak 

 granules. Tarsi as in j (see under r ?). 

 Secondary crests of hand quite obsolete (except 

 quite distally). Ventral surface of last abdo- 

 minal segment either densely and coarsely 

 granular, or the granulation weak or nearly 

 (sometimes quite ?) obsolete in the mesial part 



? 0. glabrifrons, Pet. 



b-. Inferior median crests of cauda distinctly 

 defined, the space between them in segment 1 

 not filled up with numerous granules (in pug- 

 nax there may be a couple of very coarse 

 granules between the crests in segment 1). 

 Tarsi as in 3 (see under b'?). Secondary 

 crests of hand mostly well developed. 



a- 1 . Inferior median keels of 1st caudal seg- 

 ment composed of a series of 6-10 very 

 coarse granules. Ventral surface of last 

 abdominal segment with very coarse granu- 

 lation. (If the whole surface be granular, 

 not more than about 10 irregular trans- 

 verse rows can be roughly counted between 

 the anterior and posterior margins in the 

 mesial part) . . . . ? 0. puynax, Thor. 



13 



