THE AGALENID^E 



IOI 



common varieties (figs. 236, 237). This species and longitarsus 

 are both easily mistaken for Amanrobius sylvestris and ferox, 

 which are of the same size and color and live in the same 

 situations. Amaurobius does not have the long upper spin- 

 nerets like Tegenaria, the eyes are lower on the front of 

 the head, and there are larger light-colored markings on the 

 front of the abdomen. The young of Tegenaria medicinalis 



Fig. 238. Web of Tegenaria medicinalis in a hollow of a rock, the front edge held up by 

 threads running across the hollow, and the mouth of the tube showing behind it. 



are pale, with light gray markings, and the cephalothorax is 

 marked with spots radiating from the dorsal groove (fig. 234). 

 The web of this spider is not flat like that of Agalena, but 

 curved in various shapes according to the place where it is 

 built. If there is an open level place near the nest, the web 

 spreads across it, but usually curves upward at the edges and 

 is fastened to surrounding stones and weeds. Where the 

 spider lives in the cracks of a wall or rock, the net spreads 



