66 The Structure and Habits of Spiders. 



The web of Xephila pbimipes, described by 

 Wilder, consists also of loops running round 

 about quarter of a circle. Fig. 30 ; and in this 

 web the smooth cross-lines which are nrst 

 spun are not removed, but remain after it is 

 finished. Fig. 31 shows part of one side of a 

 web ; the arrows marking the smooth thread, 

 and the direction in which it was spun. 



Argiopt, the large black and yelio'.v autumn 

 spiders, cross the middle of the web i.^'ith a zig- 

 zag band of white si'k. which, as the web is 

 obliquely hung, partly conceals the spider under 



