170 
Annals of the Transvaal Museum. 
A NEW SPECIES OF TICK FROM THE TRANSVAAL. 
By Professor L. G. Neumann, of Toulouse. 
RHIPICENTOR VICINTTS, n. sp. 
Male. — Body sub-oval, wider near tlie posterior third, slightly 
constricted behind the eyes, 6 mm. long (rostrum included), 3.2 nun. 
wide near the posterior third. Dorsal shield slightly convex, shining, 
chestnut brown in colour, without spots, a narrow margin of the 
abdomen showing beyond the shield, in the posterior two thirds ; 
cervical grooves deep and wide, spreading out widely, marginal 
groove commencing behind the eyes, deep, rather close to *;he 
margin, terminating in the groove between the two last festoons ; 
punctuations large, sub-equal, not very numerous, very distant from 
each other, arranged in lines near the lateral margins, one to two 
punctuations on each festoon ; more numerous in front of the eyes ; 
in front of the festoon a crescent-shaped depression, marked by fine 
punctuations. Eyes flat, yellowish, marginal, three small punctua- 
tions forming a border on the inner side. Ventral surface reddish 
yellow, with a few very short hairs. Anal groove semi-circular, 
opening to the front, supported behind by a single ano-marginal 
groove which terminates at the median festoon ; genital grooves 
diverging widely behind coxae IV ; ventral festoons well marked, 
wider than long, no groove limiting them in front. No caudal 
prolongation. Peritremes of a medium size, comma shaped, with 
the prolongation extending postero-dorsally. Rostrum 0.92 mm. 
long (from the tip of the palpi to the point of the posterior angles). 
Dorsal surface of the base twice as wide as long, lateral angles near 
the anterior third, very sharp and projecting, the posterior angles 
prominent but not spiniform, prolonged in front by a slight 
projection, which bounds a depression on the dorsal surface almost 
equal to a third of the width. Hypostome wide, slightly spatulate, 
six rows of strong teeth present. Palpi as wide as long, convex on 
their external edges ; the first article scarcely visible, the second 
nearly twice as wide as long, prolonged in a strong, retrograde spine 
on its postero- ventral margin, and bearing a fringe of whitish hairs 
on the inner ventral margin ; the third article without ventral spines ; 
the fourth article small and hidden in the pit of the third article. 
Legs strong. Coxae I as long as the dorsal surface of the rostrum, 
divided into two strong, sub-equal contiguous spines which form 
three-quarters of their length ; coxae II and III divided on their 
posterior margins into two flat, sharp spines, which are as wide as 
long ; coxae IV large, almost as wide as long, provided on their 
posterior margins with two long, narrow sub-equal spines, well 
separated from each other, the inner one a little larger, not as long 
as the coxa. Second article of the first pair of legs provided near 
the distal extremity with a spine, dorsal, retrograde, flat, aliform, 
and as wide as long. The third, fourth, and fifth articles short and 
thick, but more slender than those of R. bicornis. Tarsi small, 
sloping at the distal end, with a small spur and weak claws. 
