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Show 1875.] NEW SPECIES O F E R I G O N E . 333 colour, is of tolerable size and has a slightly prominent lobe near the middle of its outer side, and above this, towards its base, there is a subangular prominence; the palpal organs are well developed, prominent, and complex ; among other corneous processes is a largish one which projects backwards from near their base, and is of a somewhat bent, blunt-pointed, conical form. The falces are long, strong, and divergent, considerably cut away or excavated towards their inner extremities, and a large portion of their front surface is thickly marked with small granulosities or slight tubercles, from some (if not all) of which there issues a single short bristly hair; on both the upper and underside of the extremity of each falx is a single tooth, between which two teeth the fang, which is long and strong, lies. The maxilla and labium are, like the falces, of a deep brown colour, tinged with yellowish, the colour of the sternum being much blacker. The abdomen is of a rather slender oval form, black, glossy, and clothed sparingly with hairs ; just above the spinners are several transverse curved folds or wrinkles in the skin, in a longitudinal series. This Spider is very nearly allied to Erigone rurestris, Koch,-= £\ fuscipalpis, ej.,=Neriene gracilis, Bl., + N. flavipes, Bl., and might be easily mistaken for it by its general characters of size, colour, and structure ; but the tuberculous frontal surface of the falces and the corneous projection at the base of the palpal organs, particularly noted above and shown in figure 7, b & c, will, among other differences, serve to distinguish it at once. A single example was received from M . Eugene Simon, by whom it was found on the Col de Natoia, between Embrun and Barcelonette, in 1872. ERIGONE PCETULA, sp. n. (Plate XLIV. fig. 8.) Adult male, length rather less than 1 line. The cephalothorax is of a dull yellow-brown colour, broadly radiated in the thoracic region with dark blackish brown lines, showing the direction of the converging indentations; an indistinct curved blackish line runs backwards from each of the lateral pairs of eyes, converging towards the occiput, and another, more strongly defined, runs backwards from the hind central eyes to the thorax; this line is dilated on the occiput into a somewhat arrow-headed marking, the point of which is directed backwards : the caput is large, the occipital region being the highest part of the cephalothorax, whence the profile line slopes both forwards and backwards without any depression ; the cephalothorax has thus a humpbacked appearance; the clypeus is vertical, and its height is equal to half that of the facial space. The eyes are in the ordinary position at the extremity of the front slope of the caput ; they are small and do not differ greatly in their relative size. Those of the hinder row are equidistant from each other, the interval a little exceeding an eye's diameter; the front row is shorter than the hinder one, the eyes of each lateral pair being obliquely placed; those of the fore central pair are smallest of the eight and contiguous to each other, the interval between each of |