FIG. 37. A SECTION SHOWING THE BURROW MADE BY THE FEMALE 



OF ONE OF THE TRAPDOOR SPIDERS. 



(From a specimen and Moggridge.) 



There is a neatly fashioned circular lid, externally like the surround- 

 ing earth. The figure shows an open and a closed lid. The lid is made 

 of earth and works on a silken hinge ; on its under surface there are 

 some minute holes into which the spider fixes its claws in drawing the 

 door shut. 



The spider is seen at the foot of her nest or burrow. 



There is often a side passage, as is shown. There is a hinged door 

 which the spider can draw shut if it retreats into the side passage, e.g. 

 before the advance of a digger wasp that has found the outer lid open. 



131 



