Page:Harvesting ants and trap-door spiders. Notes and observations on their habits and dwellings (IA harvestingantstr00mogg).pdf/118

 Of the two spiders which are shown with their cork nests in Plates VII. and VIII., the purplish grey Cteniza fodiens, (Plate VII.) appears to be much rarer than the brown striped Nemesia cæmentaria (VIII.), at any rate at Mentone. I have hitherto only succeeded in obtaining four specimens of the former, though I have searched repeatedly for them at Cannes and Mentone, while the latter species is tolerably common.

The nests are, however, often extremely hard to find, and in some cases it is only by chance that I have been able to light upon them. All these trap-door spiders seem usually to prefer rather moist and shady places, and sloping banks or loose terrace walls where the interstices between the stones are filled up with earth, and concealment is afforded by the creeping lycopodium (Selaginella denticulata), Ceterach, spleenwort or maiden-hair ferns, with short moss and splashes of white lichen to distract the eye.

It was from such a terrace wall at Mentone, on March 26, 1872, that the nest A in Plate VII. was taken, the tube running obliquely back into the earth between the stones, and the door being concealed by a net-work of lycopodium, one spray of which had been allowed to grow on its upper surface.

The tubes of these as of the other kinds of nest are sometimes straight, but more frequently they are bent, and almost always take a downward course.

The following is Mr. Pickard-Cambridge's description of Cteniza fodiens, the spider which constructs this nest.*