Nciu Genera and Species of South Africcm Spiders. 123 



spined, the under surface having 1-2 inner, 3 outer, and often 1-2 

 mesial spines, the outer and inner surfaces each with 2-4 other 

 spines in addition; the inner apical spine on under surface stout but 

 much slenderer than the adjacent spur and situated close to it on 

 its inner side, the spur and spine being separated at base by not 

 more than the width of the spur. 



Length of trunk (carapace + abdomen), $ $ 11|— 14 mm., largest $ 

 20 ; length of carapace, $ $ 5-5J, 2 7. 



Nests. — The nests, of which I dug up a large number in the loose 



'*.".' 





A B 



Fig. A. Burrow of Spiroctenus pallidipes, n. sp., in vertical section (^ nat, size). 

 Fig. B. Burrow of S. pectiniger (E. Sim.) in vertical section (^ nat. size). 



red sand near the river, were all built on the same plan, and 

 consisted of a vertical burrow, sometimes inclined for 2-3 cm. at 

 the entrance, where it is about 8-11 mm. in diameter, while at 

 a depth of about 18-23 cm. the burrow curves sideways and enlarges 

 into a chamber 2f cm. or more in diameter and generally about 5 cm. 

 in length. At 2^— 7J cm. from the end of the chamber in its upper 

 wall is a small side chamber just large enough to contain the spider, 

 and here she almost always hides when her burrow is du up. This 

 side-chamber is sometimes nearly vertical and sometimes nearly 



