134 Annals of the South African Museum. 



but much narrower, and the last one is a little longer than the two 

 preceding put together and is bi-carinate laterally ; the forceps are 

 slightly reflexed, equal in length to the last segment and the 

 branches are straight outwardly, but curved at tip ; the inner part is 

 serrulate and the left branch has a minute, not very distinct tooth at 

 a short distance from the tip, while the right one, which is also 

 serrate inwardly, has a distinct tooth at about one-third of the 

 length ; on the upper part each segment has on each side a dorsal 

 series of duplicate setae and a similar marginal one, but there is a 

 semicircular series on the three prothoracic segments ; the spiracles 

 are very distinct, except on the three last horny joints, and the 

 ventral side is densely bristly ; the three last horny segments bear 

 also numerous fulvous bristles which are still denser on the forceps, 

 and the seven basal abdominal joints have an apical, lateral, tri- 

 articulate claw-like process ; the penultimate ventral segment is 

 deeply incised in the middle. 



? . Usually a little larger than the male, a little more ampliate 

 laterally and easily recognised by the shorter antennae, the more 

 robust forceps, and the shape and sculpture of the three last 

 segments of the body. The antennae reach barely the base of the 

 mesothorax ; they have forty-two joints, the four basal are glabrous, 

 the second and third are a little longer than the basal one, the fourth 

 is much smaller, the ten joints following are somewhat compressed, 

 transverse, twice as broad as long, set very closely together, briefly 

 and densely setulose, and are gradually decreasing in length ; the 

 other twenty-eight are also gradually attenuate, but although being 

 as nearly closely set as the previous ten, they are not quite so trans- 

 verse and are more convex ; the fifteenth joint is distinctly smaller 

 than the fourteenth ; the three apical segments, which in the male 

 are simply punctate and have only lateral or marginal setee, are 

 very rugose, almost roughly shagreened and are densely setose all 

 over, the forceps are also much more strongly serrate and the inner 

 teeth are much stronger ; the seventh dorsal segment is ampliate 

 laterally and the dentate apical angle is stronger ; beneath the pen- 

 ultimate ventral segment is obliterated; the three thoracic dorsal 

 segments are more developed, and being much more deeply impressed 

 longitudinally in the centre, they have more the appearance of wing- 

 cases. 



This species, and probably the others also, is very pugnacious. 

 It curves its back so as to bring the forceps over its head in fighting, 

 and examples have been known, when kept in a small receptacle, to 

 cut one another in two. They are found under stones in the adult 



