21 Araneae. 
223 
3. JEresus echinatus n. sp. 
Specimens. 2 adult ??, 1 nearly inaturc 9 and 30 very young specimens (mostly from one nest) 
from Rooibank, south-west of Walfish Bay in Southern Hereroland, May 1905. 
Colour as in E. fumosus C. Koch. 
Cephalothorax a little longer than the tibia, metatarsus and tarsus of first leg, its surface, 
especially on the cephalic region, densely covered with granules, the sides of the head with numerous, short, 
stout, pointed spinules, which are longest in the lower part. Cephalic portion shaped as in E. fumosus, high, 
raised considerably above the level of the foveal region, its width subequal to or slightly exceeding the 
width of the thorax, subequal to or exceeding the length of the patella and tibia but less than the length 
of the tibia and metatarsus (by about 1 / i — 1 / 8 of the metatarsus) of first leg and equal to the distance from 
the bottom of the fovea to the upper margins of the posterior median eyes. 
Posterior median eyes not very large, less than 2 but more than 1V2 diameters apart and about (or 
nearly) 3 diameters from the anterior lateral eyes ; the anterior median eyes a trifie below the level of the 
lower margins of the posterior median eyes. 
Legs. Femora III and IV with a mane of long hairs below, I and II with few or hardly any hairs 
on underside but thickly covered instead with short stout pointed spinules, like a flat brush, III with a 
smaller number of similar spinules scattered amongst the long hairs, IV without any spinules; the bases of 
the femora, at least in I and II, with some very small spinules on the sides as well. Trochanters I and II 
with only a very few minute spinules between the hairs. Coxae I and II with a few minute appressed spinules 
on posterior and anterior surfaces but none on underside, III practically without spinules. Patellae without 
spinules. 
Pedipalps densely spined on inner surface of tibia and on inner and under surfaces of tarsus; 
patella with a number of small spinules on inner surface (much fewer than in E. fumosus), only a few of 
the distal ones overhanging the edge ; femur with a few spinules below. 
Chelicera with some sharp spinules scattered amongst the hairs of the anterior surface. 
Stern um clothed with fine hairs only on the posterior half; the hairs on the anterior half thickened 
at the base, with a few sharp and rather slender spinules between them. 
Vulva as in E. fumosus, the emarginations and septum very like that of E. namaquensis n. sp. 
Total length 16 mm ; length of cephalothorax 7% mm ; width of head 5V4 mm, of thorax across 
foveal region 5 mm. 
This species is very closely allied to E. fumosus, the only differences of importance being the spinous 
characters of the sternum and parts of the legs. In E. fumosus the sternum is thickly covered with minute 
sharp spinules distributed between the hairs, the two anterior coxae of the legs and to a lesser extent the 
third coxa are also more densely spinulose, and the patellae of the two anterior pairs of legs are densely 
but very shortly spinulose on the anterior side. 
The following specimens of Eresus were too young to be identified: 
a) I juv. ? from Lüderitz Bay, Great Namaqualand, perhaps identical with E. namaquensis n. sp. 
b) 1 juv. $ from Kubub, Great Namaqualand. 
c) 2 nearly mature ?? from the Kalahari (Lehututu to Kang), Bechuanaland Protectorate. 
d) I juv. from near Severelela, Kalahari, Bechuanaland Protectorate. 
