Annals of the Transvaal Museum. 



granulations, more numerous on the ventral than on the dorsal surface, 

 most numerous in the region of the rostrum, more numerous on 

 individuals of medium size than on young or engorged females. On 

 the dorsal surface a median prominence limited behind by a transverse 

 groove near the posterior quarter of the length, and crossed in its 

 middle by a constricted pit. Seven (7) similar pits, of which one is 

 median and situated in the anterior extremity of the prominence, are 

 distributed in front, at a certain distance from the anterior edge. 

 From each of these paired pits a groove extends backward, the inner 

 one joining the anterior part of the median prominence, the two 

 middle ones on the sides and the two outer ones limiting the median 

 prominence laterally and joining the transverse groove, behind which 

 they pass, and behind which they are recurved. Another transverse 

 groove behind at a little distance from the posterior margin. On the 

 ventral surface a transverse groove with the concavity behind, situated 

 immediately in front of the anus, known as the pre-anal groove, which 

 unites with the sub-coxal groove. Behind the pre-anal groove, six 

 longitudinal grooves, especially apparent in the large individuals, 

 symmetrical, three on each side, the middle ones longer, curved 

 inward, and meeting the anus in front by a short median groove which 

 joins their anterior by two branches like an inverted Y. Coxal folds 

 not very prominent; sub-coxal folds well marked, the folds and grooves 

 which limit them stopping at the pre-anal groove, Sficj mafic plafps 

 at the sides and above the coxal folds, opposite the third inter-coxal 

 space, just anterior of tlie lateral constriction, semi-luiiatc in outline. 

 Anus wider than long. Four oculiform points (eyes), tvx'o on 

 each side, situated on the sub-coxal fold, opposite the fiist pair 

 of coxae, the second opposite the second inter-coxal space and consist- 

 ing of a hemispherical shining organ. Intcfjunient thick, with 

 granulations consisting of irregularly hemispherical prominences, very 

 thin on the summits, thick on the outer parts ; plaited and crenulated 

 about their bases ; between them, in the narrow depressions, wrinkles 

 or small polygonal meshes. In the large depressions or grooves, on 

 the dorsal surface and on the ventral surface, the granulations are 

 replaced by small oval pits, each one divided into a larger number of 

 small polygonal and contiguous areas. liostruii} strong, base nhort 

 and rectangular, wider than long, sides slightly convex, more or less 

 sunken in a deep pit, with slightly raised edges; mandibles elongate, 

 inner apophysis of digit in the form of a simple claw, inserted a little 

 below the middle ; outer apophysis bidentate, with the basal tooth 

 placed opposite the inner apophysis, the upper tooth recurved, with a 

 short point ; sheath a little spinous in its anterior part, simply striated 

 the remainder of its extent; hypostome short, wide at its base, rounded 

 or notched at its extremity ; teeth forming three irregular longitiulinal 

 series ; the outer row stronger ; on the inside two or three series of 

 teeth becoming shorter and shorter, beginning only in the middle or 

 posterior quarter of the hypostome and extending backward to the 

 same distance as the preceding, each row comprising only five to eight 

 small teeth, decreasing in size; two hairs at the base of the hypostome; 

 palpi elongate and narrow, articles plainly cylindrical, of a diameter 

 diminishing rapidly from first to fourth. On all the surfaces of each 

 article some stout hairs very unequal in length, with blunt or swollen 

 tips, the last article rounded at its tip, which is naked, without spines. 

 Legs strong, the fourth pair one and a half times as long as the first; 



