192 SUPPLEMENT TO 



* 



Whether these nests are equally showy we cannot 

 tell, as the account is brief and few details are given ; 

 but one, that of Ci/riocej)halus terricola, appears to 

 differ in having threads stretched from the opening 

 of its funnel, which serve to ensnare insects and to 

 give notice of these captures. 



The great trap-door group therefore comprises 

 spiders which differ widely in respect of their dwell- 

 ing places. Some construct no nest at all or onl}^ an 

 irregular web, and live under stones ; others, like 

 Therapliosa Blondii, make a simple cylindrical tunnel, 

 or, like those just described, a tube having a pro- 

 longed, uncovered, funnel-shaped mouth : others 

 again, belonging to the genus Aiyjms, form the 

 curious and as yet imperfectly-understood nests with a 

 silken tubular lining, part of which hangs down out- 

 side ; while on the highest rung of the architectural 

 ladder, stand the builders of the veritable trap- door 

 nests. 



It seems quite possible that, when we know more 

 of the structures made by Territelarice generally in 

 various parts of the world, we shall find that nests of 

 various degrees of complexity and perfection of 

 structure exist, bridging over the gulf between the 

 barbarous dwellers under stones and the highly civi- 

 lized inhabitants of the branched wafer and cork 

 nests. 



Indeed, thanks to recent discoveries, I am already 

 able to do something of this kind for one small group 

 of spiders, namely, for that of the European Nemesias 

 havine: nests with wafer doors. 



I hope to make this plain by reference to the 

 diagrams on Plate XIV., where the figures C, D, E, F, 



