Aishstals of the Transvaal Museum. 
105' 
anal plates large, wide, triangular, almost twice as long as wide, 
inner margin concave, outer and posterior convex ; the colour is deep 
chestnut ; a few large bristling hairs on the posterior part ; stigmatic 
plates comma-shaped, chestnut coloured, lighter on the periphery, and 
surrounded by an outer concave margin ; a small supplementary 
ivory-like plate. Base of rostrum reddish brown, lateral margins 
whitish ; palpi yellowish white on their dorsal surface. Legs of 
medium length ; articles whitish on their dorsal margin and at the 
distal extremity; coxae I conical, with point thick, recurved back- 
ward and a little outward ; near the postero-external angle a narrow 
long’ spine. 
Female . — Body oval, flat, 8 to 8.5 mm. long. Dorsal shield 
cordiform of same colour as that of male, with design similar to that 
of male; punctuations large, more abundant than in male; inside the 
eyes a small oblique spot; eyes as in the male. Dorsal surface deep 
reddish brown, traversed by longitudinal grooves, punctured, 
wrinkled ; a marginal groove and posterior festoons near the posterior 
third, inside the marginal groove, and, on each side, a large light- 
red spot, rounded, salient, smooth ; abundant hairs on the remainder 
of the dorsal surface. Stigmatic plates as in male. Rostrum and legs 
as in male. 
H osts. — H ippopotamus amphibious . 
Habitat. — South Africa, East Africa. 
I have never seen a specimen of this species, and the above 
description is compiled from those given by Neumann in his “ Revision 
de la Famille des IxodidesE 
GENES MARGAROPUS. KARSCH. 
Margaropus , Karsch (1879). 
Boophilus, Curtice (1890). 
Rhipicephalus, Neumann (1897). 
Margaropus, Karsch (Neumann, 1907). 
Rostrum short; palpi, more or less angular; eyes present. No 
anal groove. Stigmatic plates circular or oval ; two anal plates, free 
or united in part, with or without accessory plates in the male, n 
strong terminal spur on the tarsi. 
There are only two species, with several varieties, in thC; genus, 
M. anna lotus and M . lounsburyi. It was a study of the latter species 
which he made in 1907 that caused Neumann to re-erect this genus. 
A study of both sexes of M. lounsburyi made him conclude that it 
was closely related to R. annulatus, which had always been causing* 
so much difference of opinion as to whether it should stand in a 
separate genus, or form a sub-genus of Rhipicephalus. The femaKs 
were so closely similar that they plainly could not be separated, while 
in the males the absence of anal grooves and the circular form of the 
stigmatic plates clearly sets them off from Rhipicephalus , although 
they do not resemble each other in other details, such as in the form of 
the anal plates. The new species made him decide that they should 
