THE AGALENID/E 



95 



and enlarged as the spider grows. If, however, the web 

 should be destroyed, the spider is able in one day to make 

 a new one as large as the old, but thin and transparent. The 

 web contains many long threads crossing it from one side to 



Fig. 227. Web of Agalena naevia in a plant of golden-rod two feet above the ground, 

 showing upper threads. One-fourth the real size. 



the other and nearly parallel, and these are crossed in all 

 directions by finer threads (fig. 226). The long threads are spun 

 from the lower spinnerets, the upper pair being held up over 

 the back, out of the way. The fine threads are spun from the 

 upper spinnerets, which are swung from side to side as the 



