THE SPIDEE AND ITS ALLIES 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 (Temtelariee l ) . 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. 



