Annals of the Transvaal Museum. 
113 
from one side to the other, and its false articulation proximal, and 
indicated by a small disc of insertion ; the fourth dilated the same, 
irregularly hexagonal ; the fifth, less dilated, seems inserted on the 
^preceding by the middle of the ventral border. This disposition 
produces on the dorsal border of the three legs deep sinuses, which 
•correspond in the second, third, and fourth articulations ; the third pair 
shows a similar dilation, but less pronounced in the same articles ; the 
third and the fourth sub-rectangular, but a little longer than wide ; the 
■fifth approaches the ordinary form, and the articular sinuses are shallower 
than in the third pair ; this is true in the first and second pairs, but 
more feebly developed. 
Female. — Body elliptical or oval (a little wider in front than behind), 
generally a little constricted in the middle (at the level of the stigmatic 
plates), often attaining 16 mm. in length by 10 mm. in width ; of a 
yellowish grey tint (young) or deep brick red (engorged and in alcohol). 
Dorsal shield glabrous, very small, longer than wide (about 1.10 mm. by 
0.92 nun.), emargination in front, for insertion of base of rostrum, lateral 
edges parallel, and a little convex at first, then curved, and converging 
from the region of the eyes to unite in a broad rounded angle ; cervical 
grooves well marked, dividing the shield into three parts, the median at 
least twice as wide as the lateral ; eyes relatively large, projecting, of 
the same colour as the shield toward the . middle of its length, punctua- 
tions absent ; colour reddish brown. For almost the whole of the length 
of the dorsal surface, two longitudinal grooves, less marked in front, 
disappearing a little distance from the shield, and from the posterior 
border ; between them, an uneven groove occupying more of the posterior 
-half of the length of the body. On the ventral surface , genital pore small, 
very anterior, opposite coxae I ; genital grooves commencing only at the 
level of coxae II ; stigmatic plates in a short oval, with wide axis longi- 
tudinal, hairs very short, scattered over the surface of the body. Rostrum 
(VII, e) very short, the base more than twice as wide as long, sub-hexagonal, 
inserted in the shield by its posterior half, with sides convex, not angular ; 
posterior angles not salient ; porose areas elongated transversely ; twice 
as wide as long, separated by an interval less than their length ; mandibles 
resembling those of the male ; liypostome resembling that of the male, 
but with eight to nine teeth in a row, with anterior denticles few in 
number; palpi similar to those of the male, longer, the third article less 
angular on the exterior. Legs very different to those of the male, and 
conforming to those of annulatus , but thicker, with articles deep brown 
at their distal extremities ; coxae sub-triangular, rounded at the internal 
tip ; a very small spine toward the middle of the posterior border of 
coxae I ; articles II and III swollen at their distal extremities ; tarsi 
long, terminated by a long spine, and relatively slender ; preceded, by a 
small spine on the ventral side, and bearing at its base on the dorsal 
side an ambulacre, with a disc resembling that of the male. 
Nymph. — Body 2 to' 2.5 mm. long ; greyish ; oorcliform (wide in front, 
narrow behind) ; shield as wide as long, pentagonal. Legs cylindrical, 
with the articles short and swollen at the distal extremity ; tarsi short. 
Hosts. — Horses, and sometimes cattle. 
Habitat. — The highland districts of Cape Colony, Basutoland, and 
probably Orange Biver Colony, Central Africa. 
