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Show 1874.] REV. O. P. CAMBRIDGE ON NEW DRASSIDES. 383 cephalothorax is oval, most pointed before; the lateral constrictions at the caput are very slight; and the normal grooves and indentations are indicated by blackish lines, the ground-colour of the cephalothorax being a rich deep brown, as also is that of the legs (except the tarsi, which are reddish yellow-brown), the palpi, falces, maxillae, labium, and sternum-the extremities of the maxillae, however, being pale; the abdomen is black, the spinners deep brown, and the spiracular plates yellow-brown. The eyes are in two almost straight transverse lines, the foremost being the shortest. The interval separating those of the hind central pair (which are small, oval, but not oblique) is rather less than that which divides each from the hind lateral next to it. The four laterals are larger than the four centrals, those of the front row being the largest of the eight; and each of these is separated from the hind lateral on its side by an interval equal to that which divides each hind lateral from the hind central nearest to it; each fore central is very nearly contiguous to the fore lateral on its side, the interval between the two fore centrals being apparently greater than the diameter of one of them ; but these eyes are so dark and indistinct that it is not easy to see their exact position. The figure formed by the eight eye3 is an oblong whose length (i. e. transverse diameter) is as nearly as possible double its longitudinal diameter (or width). The height of the clypeus is low, being less than half that of the facial space. The legs are moderately long and strong, the femora being peculiarly strong and incrassated on their uppersides ; they are furnished with hairs ; and the tibiae and metatarsi of the third and fourth pairs have some tolerably strong spines ; the two terminal tarsal claws of the fourth pair are rather longer, stronger, and less curved than the rest. The character of the maxillae and labium is normal. The falces are moderate in length and strength, a little projecting forwards and arched near their base in front, where they are furnished with strong bristly hairs. The abdomen is oblong-oval, very sparingly clothed with hairs; it projects a little over the base of the cephalothorax. The inferior pair of spinners are longest and strongest, but not so disproportioned in size to the others as in P. tristicula and some others; the genital aperture is of characteristic form (vide Plate LI. fig. 10), and yellow-brown, with deep red-brown margins. Three adult females of this species were found by myself in May 1864, under stones at Corfu. PROSTHESIMA PALLIDA, sp. n. (Plate LI. fig. 11.) Adult male, length 3 lines ; adult female 3| lines. This species will be readily distinguished by the almost immaculate yellow colour of the whole of the fore part, i. e. all except the abdomen, which is of a yellowish mouse-coloured brown above, the underside being pale dullish yellow. The cephalothorax is of the ordinary form, rather narrower and a little more constricted laterally at the caput than in P. tristicula; it |