130 
Annals op the Tkansvaal Museum. 
coxae II and III rectangular, coxae III with a small posterior tooth ; tarsi 
long and thick. 
Eggs. — Light yellowish brown in colour | elliptical in outline, surface- 
smooth and shiny ; length 0.50 mm. by 0.30 mm. wide. 
Hosts. — Cattle, horse, mule, sheep, goat, dog, rabbit, buffalo (Box 
caffer), man. 
Habitat. — Cape Colony, Transvaal, Rhodesia, Portuguese East Africa,, 
ffatal. 
This tick is the principal agent in the transmission of the East Coast- 
fever. It seems to be. a general feeder on all warm-blooded animals, and is- 
of very wide distribution over the whole of South Africa except in extremely 
dry places in the interior. 
RHIPICEPHALES BURSA. CANE ST BIN I AND FANZAGO. 
Rhipicephalus bursa, Canestrini and Eanzago (1877-78). 
Rhipicephalus bilenus, Pavesi (1883). 
Rhipicephalus bursa, Canestrini and Fanzago (Neumann, 1897). 
Plate VIII, figure li ; Plate X, figure h. 
Male. — Length 4.5 mm. by 3 mm. wide, regularly widened from front 
to back, sometimes provided in the posterior extremity with a conical 
appendage. Shield (VIII, h) reddish brown, ordinarily covering all the 
dorsal surface, sprinkled with fine pores on all its extent, the largest on the 
borders, sometimes transparent and allowing the branches of the intestines^ 
to show through as black radiating lines ; cervical grooves short ; a short 
median groove in posterior portion, on each side of which are two rounded 
pits ; posterior margin divided into eleven rectangular festoons ; eyes pale,, 
situated at the level of the posterior margin of coxae II. Ventral surface 
brownish red ; covered with fine hairs ; on each side of the anus a tri- 
angular plate, sides equal in length, base very wide, lateral of each of these 
plates, a straight spine, weak, often a little chitinous. Rostrum with base 
wider than long ; prominent lateral angles ; palpi rather short and thick 
and angular on their outer edges, articles I and II bearing on their inner- 
ventral edges each a prominence, very marked on article I ; a row of stout 
spines, a little dentate on the inner ventral edges ; hypostome with six rows 
of teeth, each row composed of about 12 teeth ; mandibles with process of 
inner apophysis elongate transversely jand fridentate, outer apophysis 
bidentate, terminal tooth very weak. Legs with coxae of their last pair, 
provided with two spines on their posterior margin, one in the middle, the- 
other on the inner angle ; tarsi of the three last pairs terminated by two 
consecutive, well-developed claws. 
Female (young). — Body oval, flat, reddish brown, 4 mm. long by 2 mm. 
wide ; (engorged) it is ovoid, swollen, thick, almost as wide at each end, 
and often attains a size of 17 mm. long by 9 mm. wide. Dorsal shield (X, h)> 
an oval lozenge, with sides sinuous and rounded, almost as wide as long, 
hollowed by very numerous pores equal and evenly distributed ; eyes near 
the middle of the length, lateral grooves not well formed. Dorsal 
integument ordinarily provided with thinly distributed hairs, more abundant 
on the ventral surface when young, numerous punctuations on the dorsal 
surface ; a marginal groove on each side, three very deep grooves, the 
