113 



from one side to tlie other, and its false articulation proximal, and 

 indicated hy a small disc of insertion ; the fourth dilated the same, 

 irregularly hexagonal ; the iitth, less dilated, seems inserted on the 

 preceding by the middle of the ventral border. This disposition 

 produces on the dorsal border of tlie thre«^ 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 

 tliird and the fourth sub-rectangular, but a little longer than wide ; the 

 fiftli approaches tlie ordinary form, and the articular sinuses are shalh)wer 

 tlian in the tliird pair ; this is true in the first and second pairs, hut 

 more feebly developed. 



FeiR ale. —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 1(5 mm. in length by 10 mm. in width ; of a 

 jellowisli grey tint (young) or deep brick red (engorged and in alcohol). 

 Dorsal sliieh] glabrous, very small, longer than wide (about 1.10 mm. 1)y 

 0.92 mm.), 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 t^^•ice as A\'ide 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 

 horder ; lietweeii 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 1 ; genital grooves commencing only at the 

 level of coxae 11 ; stigmatic plates in a short oval, with wide axis longi- 

 tudinal, hairs very short, scattered over the surface of the body. Bostrurn 

 {VII, e) very short, the base more than twice as wide as long, suh-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 l)y an interval less than their length ; mandibles 

 reseinl)ling those of the male ; hypostome reseml)ling 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. Le;/.^ very different to those of the male, and 

 conforming to those of annuhrlus, ]mt 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 l)order of 



■coxae I; articles II and III swollen at their distal extremities ; tarsi 

 long, terminated hy a long s])ine, and relatively slender ; ])receded by a 

 small <pine oir the ventral side, and bearing at its base on the dorsal 

 side an ambulacre, with a disc resend)liiig that of the male. 



.\ i/nijiJi. — P>odj/ 2 to 2.5 mm. long ; gi'eyish ; cordiforin (wide in front, 

 narrow hebind) ; shield as wide as long, pentagonal. Lei/s cylindrical, 

 with tbe articles short and swollen at the distal extremity ; tarsi short. 



Hosts. — Horses, and sometimes cattle. 



Ilahitat.— The highland districts of Cape Colonv, Basutoland, and 

 probably Orange River Colony, Central Africa. 



