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Show 332 REV. O. P. CAMBRIDGE ON [Apr. 20, The falces are tolerably long and strong, and somewhat divergent towards their extremity, near which on the inner margin are several very minute teeth. The maxilla, labium, and sternum are of ordinary form. The abdomen is short oval and pretty convex above; its colour is a pale dull luteous brown, having a mottled appearance; and it is thinly clothed with rather coarse longish hairs. This species is nearly allied to E. viva (p. 330) ; but, among other distinctions, the difference in the relative position of the eyes of the hinder row, as well as the structure of the palpal organs, and absence of the strong tooth in front of the falces, will readily distinguish it. Adult males were received from M . Simon, by whom they were found at Troyes in France. ERIGONE GROUVELLII, sp. n. (Plate XLIV. fig. 7.) Adult male, length 1 line. The cephalothorax of this Spider is of ordinary form ; the profile describes a tolerably uniform gentle curve, with a very slight depression between the occiput and the thoracic junction, the caput not being elevated above the general level. The height of the clypeus is scarcely equal to half that of the facial space; the normal grooves and indentations are visible, but not very strongly marked ; and some portions, if not the whole, of the surface, are very finely rugulose or striated with minute wrinkle-like markings. The colour of the cephalothorax is a deep yellow-brown, tinged with black; and the caput has a very few hairs along its median line. The eyes are in the usual position, not very small, nor differing greatly in their relative size; the front row is rather the shortest; and both rows curve away from each other, forming a pretty regular oval figure ; the eyes of the hinder row are very nearly equidistant from each other, the interval between the centrals being perhaps rather less than that which divides each from the lateral eye on its side ; those of the fore central pair are near together but not contiguous to each other, the interval between them being about half that which separates each from the fore lateral on its side; those of each lateral pair are placed sliglitly obliquely on a tubercle; the interval between each of the hind central eyes and the fore central nearest to it is distinctly greater than that which divides the eyes of the hind central pair, and a little greater than that which separates each of these from the hind lateral on its side. The legs are slender and of tolerable length; they are of a dull yellow colour, the femora being tinged with orange, and are furnished with hairs and a few slender spine-like bristles. The palpi are short, moderately strong, of a duller hue than the legs, and furnished with a few hairs: the cubital and radial joints are very short; the former is bent and has a single strongish, tapering, prominent, slightly sinuous black bristle a little above its fore extremity on the upperside; the radial joint is stronger than the cubitai, with one or two slight prominent points at its fore extremity on the upperside ; the digital joint, which is of a dark black-brown |