Until the discovery of the male spider now described, and which is, without doubt, the male sex of the female described immediately before, this latter was thought to be the female of _Nemesia Manderstjernæ_ (Ausserer), and it had indeed been so determined by Professor Ausserer himself. But the form of the palpal organs differs so decidedly from those of _N. Manderstjernæ_ (Ausserer, _Beiträge ... der Territelariæ, Verhandl. Z. B. Gesllsch_: Wien, 1871, Bd. xxi. p. 170), that all doubts as to the present being a distinct (and as it is believed to be) a hitherto undescribed species, are removed. From M. Ausserer's description, the pear shaped stem of the palpal bulb in _N. Manderstjernæ_ is comparatively slender, ending in a fine and uncleft point, whereas, in _N. Eleanora_, the stem is strong and its extremity cleft: other differences are also observable in the two spiders, but this one is well marked and the most tangible. The specific name, _Eleanora_, now conferred upon the species, is taken from the Christian name of the Hon. Mrs. Boyle, reference to whom has been before made, and of whose kind exertions some acknowledgment is thus permanently recorded. In fig. A, Plate XII., the upper door, which, if closed, would be entirely hidden by the long filmy mosses which surround and cover it, is represented open; but it should be clearly understood that this is artificial and not natural, as in reality these doors close of their own accord by means of their weight and the elasticity of the hinge. It will be seen that living mosses of two kinds are worked into the upper surface of this door, which was admirably concealed. (fig. A 1, Plate XII.). It is chiefly in the absence of the branch and the different form of the lower door that the nest of _Nemesia Eleanora_ differs from that of _N. meridionalis_; and, as they inhabit the same localities, it is only when one has dug down as far as the lower door that it can be known to which of the two species the nest belongs. When once this point is reached however, all doubt is at an end; for in this case the unbranched double-door nest differs from the branched in a way which any child could realize, though the respective spiders are not very dissimilar when seen with the naked eye alone. This affords a good instance of the benefit which may accrue to a collector from a study of the habits of the creatures which he collects, for it is certain that it was the nest in this case which first proclaimed the distinctness of its tenant. _Nemesia Eleanora_ is rather less common at Mentone than _N. meridionalis_, but at Cannes I found the reverse to be the case. At the latter place, on the northern slope of the little hill of St. Cassien, branched and unbranched double-door nests may, however, be found in tolerable abundance, the traps being frequently concealed by fallen leaves from the cork oaks, which are woven into their upper surface.