TRAP. DOOR SPIDERS. 1S3 



and the adjacent islands, Trieste, South France, Spain, 

 Morocco, New Granada, and Australia; while the 

 single-door wafer nest is only known at present in 

 the West India islands ;* the branched double-door 

 nest at Mentone, Cannes, and Pegli near Genoa, and 

 [doubtfully] near Naples and in Ischia ; and the un- 

 branched double-door type at Mentone and Cannes 

 alone. It is quite probable that these three latter 

 forms of nest will some day be found to have a much 

 wider range than that assigned to them here, but I 

 can scarcely think it likely that they will ever be 

 shown to claim the world-wide distribution of the 

 cork type. Supposing that these nests are eventually 

 discovered in many widely distant localities, a very 

 interesting question will arise as to the specific cha- 

 racters of the spiders which inhabit and construct 

 them. Shall we then find, for example, that nests of 

 the unbranched double-door type are not tenanted 

 and fixbrieated by Nemesia Eleanora alone, as we 

 have hitherto found to be the case, but by many 

 other distinct species also, each in its peculiar 

 district ? 



That is to say, will the type of nest remain the 

 same while the occupants vary, as in the cork 

 nests ? 



If, on the other hand, we learn that these three 

 types, the single-door wafer, the branched and un- 

 branched double-door nests, are very local, we shall 

 be led to inquire into the probable causes of this 

 limitation. 



But we must study much more closely the habits of 



* There is a nest exhibited in the Museum collection at the Jardin des 

 Plantes at Paris, marked " Am^rique du Sud," which is perhaps of this type. 



