Annals of the Transvaal Museum. 
95 
white hairs. Dorsal surface with two short anterior grooves, a little 
divergent; three posterior grooves, the median one straight, and the 
lateral grooves concave inward ; sexual orifice opposite the last inter- 
coxal space; sexual grooves- curved and converging at their posterior 
extremities; ano-marginal grooves curved inward, and approaching 
at their posterior ends, enclosing a horseshoe-shaped area ; anus as 
in male ; stigmatic plates whitish in young specimens, brownish later. 
Rostrum elongate ; base reniform on dorsal surface, a little wider than 
long on the ventral surface, pentagonal in outline ; porose areas 
elongate; mandibles elongate, inner apophysis with two backward 
projecting teeth, one terminal, the other in the middle of the length, 
a long point of insertion, ending near the posterior quarter of the 
digit; outer apophysis with five teeth, progressively increasing from 
tip to base ; hypostome elongate, lanceolate, a series of small teeth at 
the tip, followed by three rows, more or less regular, of well developed 
teeth, one lateral row, with teeth strong and sharp, the anterior and 
posterior teeth weaker, a middle row with smaller teeth, and an inner 
row of still shorter teeth, not passing below the anterior half of the 
organ ; palpi elongate, narrow, flattened and excavated as in male, 
article II especially elongate and narrow, constricted at the base. 
Legs slender, coxae elongate, contiguous when young, separated when 
female is engorged, ^oxae I, with a rudimentary spine on its posterior 
margin; hairs on all the articles; tarsi as in male. 
Hosts. — On warm-blooded animals, such as ox, mule, horse, cat, 
dog, pig, leopard, bushbuck, man, sheep, and goat. Donitz also 
reports a female as taken from a civet cat at TJmtali. 
Habitat. — Cape Colony, Orange Miver Colony, all South African 
Colonies, in grass districts (Lounsbury). 
Lounsbury states that this tick is found in the grass districts of 
all the South African Colonies, but is never very common. It seems 
to prefer humid conditions, such as are furnished by ill-drained flats 
and ravines. It is difficult to rear. All stages seem to prefer the 
head and ears of the host animal, although they may be found on any 
part of the body. So far we have not found it in the Transvaal, its 
place being taken by the variety hoivardi ; it is this tick which is 
supposed to cause the paralysis of sheep in Cape Colony. 
IXODES PILOSUS, var. HOW AUDI, NEUMANN. 
Plate IV, figures a to k. 
Male. — Similar to the type species except in the following points : 
a little smaller than pilosus, being 2.3 mm. long by 1.2 mm. wide, 
instead of 3.15 mm. by 1.6 mm. ; the spine on coxae I is very weak; 
the hypostome (IV, f) has three to four rows of teeth on each half, 
instead of one row and crenulations ; the teeth are arranged as 
follows : denticles at tip, then on each half one or two rows of three 
teeth each, the lower one of which may be reduced to only one very 
strong tooth; the inner apophysis of the mandibles has two equal 
teeth, with a basilar point of insertion (I V, i) ; the outer apophysis 
has five or six teeth instead of seven or eight. 
