m 
Annals of the Transvaal Museum. 
liypostome (III, c, d) indented at tip, provided on eacli side with 
two rows of teeth which occupy only the anterior half of the 
organ; numerous small teeth at tip, and in the case of the male several 
small teeth between large teeth and median line, crenulatiohs or small 
teeth below large teeth ; two hairs at its base. Palpi, with the first 
article longer than wide, bordered inside with a narrow flange, 
finelv cliagreened on the dorsal surface; the other articles as wide as 
long, smooth, numerous long pectinate hairs on all the articles, several 
short spines terminal on the fourth article. Legs long and slender; 1 
coxae sub-triangular, contiguous, covered on their posterior half with 
granulations similar to those of the rest of the body ; the rest of the 
surface of the coxae presents very fine granulations, which are found 
on all the extent of the other articles ; coxae I with a blunt tooth 
on the posterior median angle ; second article cylindrical, as wide as 
long in the second and third pairs, longer in the first and fourth ; 
the third, fourth, and fifth articles scarcely wider at the distal 
extremity; tarsi wider at the base than at the free end ; no pre-ungual 
groove marked, except on the first pair ; no teeth on article Y and tarsi 
as in O. savignyi eaecus. Hairs roughened or semi-pinnate on all 
the articles, more abundant and longer in the tarsi. 
Length of female, 5 to 6 mm. ; width, 3 to 3.5 mm. 
Length of male, 3.5 to 5 nun. ; width, 2 to 3 mm. 
Hosts. — Penguins, fowls, (experimentally also man). 
Habitat. —So far as is known, this variety is found mostly in the 
nests of penguins on the islands off the western coast of Cape Colony, 
where it is very abundant. It has also been reported from Tristan de 
Cunha. 
This variety differs from talaje by the lesser development of the 
cheeks which cover the rostrum. In the species they almost completely 
conceal the mouth parts, but in capensis they furnish only an 
incomplete protection at the sides, and do not reach so far as the 
posterior edges of the base of the rostrum. The hairs are also more 
abundant and longer on the movable articles of the legs than is the 
case with talaje. 
I have only seen a few preserved specimens of males and females 
of this variety, and have never been able to secure live specimens for 
rearing. Lounsbury records that they seem to alternate long periods 
of rest with short visits to the host for feeding. He also says that 
a favourite joke among the labourers of the Guano Islands, off the 
Cape Coast, is to place these ticks in the beds of new-comers. 
Sub-Family IXOHINAE. 
This sub-family is characterised as follows: — 
Rostrum terminal ; digit of mandibles provided with two 
apophyses, inner apophysis generally short, terminated by one to 
four points equal or unequal ; the outer apophysis elongate, parallel 
or straight, divided on its free border into two to four or five successive 
teeth, which increases in size from anterior to posterior; palpi free, 
with four articles, the two middle ones of which are excavated on 
the inner surface, the fourth very short and in the form of a tactile 
appendage, being lodged in a sub-terminal pit of the third. Legs 
slightly unequal ; those of the second pair the shortest, the fourth pair 
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