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Show 1875.] NEW SPECIES O F E R I G O N E . 217 Spider; the form and structure of the palpi and palpal organs are also different. A single adult male was received from M . Simon, by whom it was captured at Rouen. ERIGONE BUCEPHALA, sp. n. (Plate XXIX. fig. 23.) Adult male, length 1| line ; length of the female 1| line. The cephalothorax is of a bright reddish orange-yellow colour, the caput being strongly tinged with brown ; the thorax is covered with dark, conspicuous punctures, disposed mostly in converging lines, which follow the course of the normal indentations ; towards the margins these punctures are less regularly placed : the caput is elevated and prominent; the fore extremity, being the upper portion of the clypeus, projects forwards in a bold, obtuse, nose-like form, slightly bent downwards ; and on the occiput is a large, almost globular eminence, deeply cut away or indented on either side of the fore part at its base, the indentation extending backwards for about half its width ; the upper part of this eminence has a few short erect hairs on its smooth and glossy surface; and some more conspicuous hairs are also disposed along the middle of the ocular area in a longitudinal direction; those above the indentations are directed downwards, those below upwards; the lower part of the clypeus is strongly retreating. The eyes are in the usual four pairs ; and in this species the pairs are rather widely separated from each other-one pair (in a transverse line) on the fore part of the top of the globular eminence, about two diameters distance from each other, another pair on either side, a little below the indentation which divides the eminence from the lower segment of the caput; the eyes of each of these pairs are on a small tubercular eminence respectively, and are contiguous to each other : the fourth pair is placed just at the commencement of the nose-like prominence; these are the smallest of the eight, dark-coloured, and are very near, if not contiguous, to each other : the ocular area is thus very large, its length also being greater than its breadth. The legs are moderate in length and strength, their relative length appearing to be 4, 1, 2, 3 ; they are of a bright orange-yellow colour, tinged with reddish, and are furnished with hairs and a very few fine erect bristles ; these last are more conspicuous in the female, being of a spinous nature. The palpi, except the radial and digital joints, which are dark brownish-yellow, are similar iii colour to the legs ; they are moderately long, but strong, the humeral and cubital joints being very nearly as strong as the femora of the first pair of legs : the cubital is long, strong, bent downwards, and slightly larger at its fore than at its hinder extremity : the radial is exceedingly short, and not nearly so broad as the fore extremity of the cubital joint; it has its fore extremity on the upperside produced into a longish apophysis, whose extremity is emarginate or bifid, the outer limb of the bifid portion being prominent, sharpish-pointed (with a short, spine- |