THE SPIDKU AND ITS ALLIED 



85 



Classification. - -Spiders are separated, according as they 

 spin webs or do not do so, into two main groups, sedentary 

 and wandering spiders. The sedentary spiders are sub- 

 divided into four sub-orders, which we shall consider in 

 turn : 



FIG. 82. Mygale, a Tunnel-weaver, allied to the " trap-door spider." 



Nat. size. From Emerton. 



1. Tunnel- weavers (Territelarite 1 ). These spiders make 

 tubes in the earth, and line them with silk. The repre- 

 sentatives of this group in the Southwestern States are 



1 terra, earth ; tela, tissue or web. 



