I first made the acquaintance of _Lycosa narbonensis_ near the glass-works west of Cannes, where this spider may not rarely be found living in tubular burrows in sandy clearings among the pine woods along the shore (_Pinus pinea_, the stone pine). I have already (_Ants and Spiders_, p. 146), alluded to an account given by M. Léon Dufour of his observations on the nest and habits of the true tarantula (_Lycosa tarentula_), which he discovered in Spain. The nests of _L. narbonensis_ at Cannes resembled those described by M. Dufour, but the cylindrical, subterranean burrows were apparently shorter. It was extremely difficult to trace their course, on account of the loose sand which poured into the tubes and choked them up, and I only succeeded in doing so completely in one case, when I stuffed the tube with cotton-wool before proceeding to dig. Here the open tube, which was quite simple, and about 1 inch in diameter, descended vertically for 3-1/4 inches, and was then suddenly bent so as to become horizontal, terminating shortly afterwards in a triangular chamber, the floor of which measured 2 inches across at the widest part, and was strewed with the remains of beetles and other insects. The nest was lined throughout with coarse silk, which had a blackish hue, owing to the presence of the filaments of what I believe to have been some undeveloped fungoid growth. The mouth of the tube was open, and frequently surmounted by a short tubular prolongation, commencing at the surface of the ground, which formed a sort of chimney about an inch high and from an inch to an inch and a quarter across; this was composed of fibres of plants, pine-needles, and especially of a large branching lichen, very common in the neighbourhood of the nests, and all these materials were woven together and kept in place by a few threads of silk spun here and there. It was not every nest that was furnished with a chimney, nor were all the chimneys equally complete, for in some cases they consisted merely of a small rim or one-sided lip, while in others they resembled little birds' nests, and were sufficiently firm and compact to permit of my carrying them away. It appeared to me that these chimneys served as screens to prevent the loose sand from being swept into the burrows by the winds which rage over that open seashore plain, and that they were more or less complete in proportion as the exposure was greater or less, and the sand looser or more bound together. I captured eight of these spiders, and here, as in the trap-door group, the female alone inhabited the nest. Besides this habit, they have other points in common with trap-door spiders; such, for example, as the resemblance which exists between this nest and that of _Theraphosa Blondii_ from Brazil (see p. 188, above), and between the chimney of this Tarantula and the aërial prolongation of the tube sometimes found in nests of the wafer type.