Last spring when pulling down an old terrace-wall (by permission) I had the good fortune to discover the very remarkable male _Cteniza_ drawn at fig. A, Pl. XX., p. 254. I found no trace of a nest or web of any kind, and the spider was merely hiding between the stones. There appears to be scarcely any doubt that this is the male of the female Mentonese _Cteniza_ which has, up to this time, been called _Ct. fodiens_. A comparison with typical specimens of the true _Ct. fodiens_ from Corsica, has however shown that the two are certainly distinct, and Mr. Pickard-Cambridge[131] now describes the Mentonese form under the name of _Ct. Moggridgii_.[132] [Footnote 131: Mr. Pickard-Cambridge has once more kindly undertaken the task of naming and describing my collections of trap-door spiders, and the results of his labours will be found at the end of the present work.] [Footnote 132: I take this opportunity of thanking him for the compliment. A description of this new species will be found at p. 254, below.] The females of the true _Cteniza fodiens_ are far larger than those of our new Mentonese species, and construct their nests in dry and exposed places, instead of in the moist and shady ivy-covered banks selected by the latter. I have found _Cteniza Moggridgii_ at San Remo and Mentone, and it will probably be also discovered at Nice, but I failed to detect it either at Cannes or Hyères. The Corsican male at the first glance curiously resembles that found at Mentone, but differs essentially in details and especially in having the surface of the caput unbroken, whereas the caput of the latter presents a very peculiar character in an impressed line which runs across it from side to side (figs. A 1 and A 2). Both agree, however, in being strangely unlike their females. The other builder of a nest of the cork type at Mentone was, as has been already stated, described and figured in _Ants and Spiders_ under the name of _Nemesia cæmentaria_. Now the true _N. cæmentaria_ of Latreille is found at Montpellier, the classical habitat where the first discovery of trap-door spiders in Europe was made towards the end of the last century, but its true characters have been hitherto but imperfectly known. I have lately been able to secure several specimens at this place, and they certainly differed in their markings from the so-called _cæmentaria_ of Mentone. M. Simon had previously informed me that he considered our Mentonese spider distinct from the typical _cæmentaria_, and had kindly proposed to give my name to the Mentonese species; and now Mr. Pickard-Cambridge, on the receipt of the specimens collected by me at Montpellier, coincides with M. Simon, and adopts his nomenclature, calling the Mentonese _Nemesia N. Moggridgii_.[133] [Footnote 133: See below, p. 273.]