TRAP. DOOR SPIDERS. 



131 



TRAP-DOOR SPIDERS WHICH BUILD 



As far, therefore, as I know at present, the cork 

 type of nest is the only one which is widely spread, 

 and which is constructed by spiders of more than one 

 species. For, while the single-door wafer, and the 

 branched and unbranched double-door nests are each 

 the work of one particular spider, we see that nests 

 of the cork type are made by spiders of six distinct 

 species, belonging to at least three genera. 



It is almost certain that a much larger number of 

 spiders of different kinds, though all probably members 

 of the sub-order Territelarice, construct nests of the 

 cork type, for descriptions and sjDecimens of trap- 

 doors of this kind are brought from the most distant 

 parts of the globe. It is true that these specimens 

 and descriptions usually only show us the surface- 

 door, but as far as our present knowledge goes, we 



K 2 



