‘84 
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 bj^ 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. Stigmatic plates 
nt the sides and above the coxal folds, opposite the third inter-coxal 
space, just anterior of the lateral constriction, semi-lunate in outline. 
Anus wider than long. Four oculiform points (eyes), two on 
each side, situated on the sub-coxal fold, opposite the first pair 
of coxae, the second- opposite the second inter-coxal space and consist- 
ing of a hemispherical shining organ. l7itegument 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. Rostrum strong, base short 
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 longitudinal 
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 eigiit 
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; 
