150. Annals of the South African Museum. 



of equal width (in the dry specimen), or segment 1 or 1 and 5 

 shghtly wider than the others (in Thorell's type the tail becomes 

 slightly narrower posteriorly) ; segment 5 almost as high as 

 segment 4 ; vesicle about 4 as wide as the fifth caudal segment. 



Segments 1-3 with 10 granular crests, the superior and the upper 

 lateral crests rather weak but generally distinct, the middle lateral 

 crest very weak, sometimes indistinct, the infero-lateral and median 

 crests rather weak in segment 1 but strong and well developed in 

 segments 2-3, the infero-lateral crests in these 2 segments strongly 

 converging posteriorly towards the adjacent median crests, which 

 they almost touch at the hind ends of the segments, the 4 enlarged 

 posterior granules of the 4 crests in segment 3 forming together 

 a characteristic, transverse, broadly U-shaped crest with the upright 

 bars of the U much shorter than its width. In segment 4 only the 

 superior crests are developed, all the others being obliterated by the 

 dense granulation which covers the sides and lower surface. In 

 segment 5 the superior crest is distinct in the anterior fourth or fifth 

 of the segment, the rounded superior edges of which are densely and 

 finely granular like the sides, but provided, however, with a couple 

 of larger granules representing the inner accessory crests of the 

 upper surface ; infero-lateral crests of segment 5 distinct, with 2-3 

 of the posterior teeth enlarged and lobe-like. 



Segments 1-5 densely and finely granular on the sides and below, 

 the granulation weak in the anterior, stronger in the posterior seg- 

 ments ; under surface of segment 5 without distinct median or 

 accessory crests. 



Upper surface of all the caudal segments distinctly grooved along 

 the middle, reticularly granular laterally but shagreened in the 

 middle in segments 1-4, finely and weakly granular in the anterior 

 but smooth in tlie posterior half of segment 5 ; from the anterior 

 outer angles of the upper surface a row of granules extends obliquely 

 backwards to meet the outer edge of the shagreened area, giving the 

 latter a broadly cuncate appearance in most of the segments ; 

 posteriorly the shagreened area is constricted and then widened 

 again at the hind edge in segments 1-2 ; upper surface of segment 1 

 about one-half longer than wide in the middle, the ci'ests parallel or 

 slightly converging posteriorly, the anterior edge descending rather 

 suddenly but not quite perpendicularly in the middle. 



Vesicle granular, especially at the base below. 



Fedipalps in c? • — Tibia 2f-2f times as long as wide, the anterior 

 and posterior sides parallel in the middle third of the segment ; 

 the upper surface finely granular, its anterior crest obsolete or more 



