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Annals of the Transvaal Museum 
decidedly less than the diameter of the anterior median. At the apex of the 
tibia of the palp there is a slender straight spine-bearing projection on the 
inner side and a spine on the outer side. 
It is very probable that Pterinochilus crassispina Purcell, based on an adult 
male from the Motopo dist., Matabeleland, will prove to be referable to this 
genus. 
The Transvaal Museum has an adult male Idiothele from Wolmaranstad. 
It agrees closely with Dr Purcell’s description of Pterinochilus crassispina, 
more especially with the Vryburg specimens of that species. The more impor- 
tant measurements are: 
Text fig. ii. Idiothele nigrofulvus Poc. Portion of palp of adult male. 
Length of carapace 13-7, breadth of carapace 11*2, length of tibia I 6-8, 
length of metatarsus I 7-15, of tibia IV 7-7, of metatarsus IV 12, distance from 
fovea to hind margin of ocular tubercle 6-9. 
The distance between the anterior median eyes is a trifle greater than the 
diameter of an eye and that between anterior median and anterior lateral is 
subequal to the diameter of the median. 
The differences between the males of this species and of I. nigrofulvus do 
not seem to be very great. The carapace is more uniformly brown in this 
species, and the eyes are relatively smaller, also the shape of the carapace is 
slightly different, that of nigrofulvus being broader in proportion to its length : 
the general proportions of the leg segments are however very similar, and the 
palpal organ seems much the same in the two forms. It is probable that the 
