Annals of the Transvaal Museum. 
127 
opening opposite first intercoxal space ; stigmatic plates short, comma- 
shaped ; genital grooves extending to posterior margin, ano-marginal 
groove well marked ; festoons not very distinct. Legs slender, reddish 
brown in colour ; coxae II, III, and IV, each with two strong teeth on 
posterior margin ; coxae I, bidentate ; tarsi with two ventral spnrs ; hairs 
on all the articles. 
Hosts. — Dog, hedgehog ( Erinaceus frontalis ), horse. 
Habitat. — Congo Free State, Transvaal. 
This tick has only recently been described (Neumann, 1907) from 
the Congo. In the Transvaal it has only been taken in the Zoutpansberg 
district on dogs and hedgehogs. 
RHIPICEPH ALUS DUTTONI. NE UMANN. 
The Congo Brown Tick. 
Rliipicephalus duttoni, Neumann (1907). 
Male. — Body narrow in front, broadest (1.85 mm.) a little posterior to 
the middle, length with rostrum 3.55 mm. Dorsal shield slightly convex, 
chestnut brown without spots, abdomen does not extend beyond its margins ; 
cervical grooves very broad, shallow, and form elongate depressions, contain 
no punctures and are prolonged posteriorly by a narrow superficial groove 
which extends beyond the middle point of the length ; marginal grooves 
broad, shallow, slightly and finely punctured, commencing almost 
immediately behind the eyes, and terminating in a groove which separates 
the last from the following festoon ; punctuations irregular, coarsest in 
front, fine and superficial over the remainder of the surface ; behind are 
three wide, shallow, unpunctured longitudinal grooves, the middle, one the 
longest ; festoons longer than broad, slightly punctured, otherwise normal ; 
eyes flat, yellowish, large, marginal. Ventral surface . reddish brown, 
convexed with rather long and abundant whitish hairs ; anus anterior of 
the middle of the length of the anal shields; and shields shaped like a 
scalene triangle, the inner edges longest, forming a long inner posterior 
spine, rectilinear in the anterior half, outer edge slightly convex, posterior 
edge concave and bordered by a row of large punctuations ; ad anal, shields 
replaced by a prominent non-chitinous fold ; no caudal prolongation but 
a chitinons thickening on the median festoon ; stigmatic plates, whitish, 
narrow, comma-shaped. Rostrum with base almost twice as broad as long, 
lateral angles at about the middle of the length, posterior angles quite 
prominent ; hypostome slightly spatulate, with six rows of teeth ; palpi 
as broad as long, flattened dorsally, second segment scarcely longer than 
the third and retraced into a blunt point dorsally at its posterior border. 
Legs relatively strong ; coxae covered with long white hairs, anterior 
summit much prolonged and conspicuous on the dorsal surface as an 
auricle, with two very long spines ; on the posterior margins of the second 
and third coxae an external spine, flat, as broad as long, coxae IY divided 
on its posterior margin into two broad flat spines ; tarsi of medium size, 
with two terminal spines. 
Female. — Unknown. 
Hosts. — Cattle. 
Habitat. — Congo, Northern Transvaal, Mozambique. 
This tick seems to be very closely related to R. appendiculatus and R. 
lunulatus. It was originally described from the Congo, and only a very 
few specimens have been found in the Northern Transvaal. 
