This nest was found accidentally by Mr. Robert Lightbody, who kindly brought it to me, its presence having been betrayed by the tube, which he happened to cut through in digging up a plant. The moss on the door grew as vigorously, and had in every way the same appearance, as that which was rooted in the surrounding earth; and so perfect was the deception that I found it impossible to detect the position of the closed trap even when holding it in my hand. There can be no doubt that many nests escape observation in this way, and the artifice is the more surprising because there is strong reason to believe that this beautiful door-garden is deliberately planted with moss by the spider, and not the effect of a mere chance growth. I shall adduce evidence in support of this statement by-and-by. I alluded to the nest C (Plate VIII.) when speaking of the claw marks which it exhibits, and that figured at D and D 1 in this plate is merely an instance of a good example of this type. I have taken nests of _N. cæmentaria_ both at Cannes and Mentone, and have little doubt that this species will be discovered at many points along the Riviera. I detected two abandoned nests of the cork type, which I fully expect had belonged to _N. cæmentaria_, in an enclosed space called the Campagne de Garonne in Marseilles itself. These nests lay in the little mound of undisturbed earth between the divided trunks of the small olive-trees, and I do not doubt that if I had had time to search I should have discovered more nests, and perhaps others which were still tenanted. We now turn from the single-door nests to those with double doors, and from the well known to the new types of structure. In these we have a thin and wafer-like door at the mouth of the nest, and from two to four inches lower down, a second and solid underground door. These lower doors are characteristic of the nests to which they belong, that of the branched nest (_Nemesia meridionalis_, Plate IX.) being long and more or less tongue-shaped, while that of the unbranched double-door nest (_N. Eleanora_, Plate XII. p. 106) is somewhat horse-shoe shaped. The surface doors of these two kinds of nest do not appear to differ, and, though rather thinner, may be compared to those of the single-door wafer kind from Jamaica. The commonest form at Mentone is the branched nest, which may be found in abundance in many of the loosely-built walls of the lemon and olive terraces or on sloping banks, but they are rarely to be met with on flat ground.