Annals of the Transvaal Museum 
be referable to a species described from Barberton by Mr R. I. Pocock under 
the name of Pterinochilus nigrofulvus {Ann. Mag. Nat. Hist. 7. 1. p. 317): the 
description of that species is however very inadequate for identification pur- ' 
poses and, if I am right in my determination, the colour characters cited in 
that description are inaccurate. The determination is mainly based on the 
following points : locality datum, the length of the metatarsus of the fourth leg 
in the female, and the character of the spine of the palpal organ in the adult 
male. 
Idiothele nigrofulvus (Pocock) (text figs. 11 and 12 a, PI. II, fig. b). 
Ocular tubercle. . Subrotund, a trifle broader than long, separated from the 
anterior margin of the carapace by a distance equal to about one-half or even 
a trifle more, of the length of the tubercle. Anterior row of eyes strongly 
procurved. Distance between the lateral eyes equal to about two-thirds or 
only one-half of the length of the anterior laterals, and subequal to the length 
of the posterior laterals or only about two-thirds that length. Posterior 
medians occupying about half the area of the posterior laterals, more or less. 
Distance between anterior medians subequal to the diameter of a median. 1 
The posterior medians are very close to the anterior medians and to the 
posterior laterals, being at any rate not more than one-third of a diameter 
distant from the latter, nor more than half a diameter from the former: they 
are the smallest of the whole group, being very much smaller than the anterior 
medians. 
Carapace. Fovea a narrow slit, transverse or very slightly procurved. 
Length of carapace subequal to the patella, tibia and one-third of the meta- 
tarsus of the first leg; or to the tibia, metatarsus, and almost half of the tarsus 
of that leg; or to the metatarsus and two-thirds of the tarsus of the fourth leg. 
Legs. Tibia I with one or two apical spines inferiorly; II with two spines at 
the apex inferiorly; III with two and IV also with three or two spines similarly 
situated but a little stronger than those on I or II. Metatarsi I or II without 
spines; III with three at the apex inferiorly, one on the lower surface basally 
on the inner side, two on the anterior surface and one on the posterior surface ; 
IV with three at the apex inferiorly and two on the ventral, anterior and 
posterior surfaces. The scopulae of the tarsi and metatarsi are very dense and 
broad, being plainly visible from above. The tarsal scopulae are all entire, 
that of IV having scattered black setae mesially, but the scopula is not divided 
thereby. Metatarsus IV is completely divided by a narrow mesial strip of 
setae, but all the other metatarsal scopulae are undivided: the scopulae of 
I and II do not reach quite to the base, that of III is absent from the basal 
third, of IV from the basal two-fifths of the segment. Tibia I a trifle longer 
than the metatarsus (measured along the mid-dorsal line) but decidedly 
shorter than the distance between the fovea and the ocular tubercle. Tarsal 
claws muticous. 
Chelicerae. Inner dental series with nine or ten strong teeth: there is an 
outer series of minute teeth stretching rather more than half the length of the 
main row. Rastellum composed of long stiff setae. There is a large thick 
scopula on the outer surface of each chelicera the greatest depth of which is 
subequal to or only slightly greater than that of the naked area beneath it. 
There are about 5 or 6 long but weak stridulatory bristles on the outer surface 
most of which are situated inferiorly, near to the bristles which fringe the fang 
groove. 
