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Show 1874.] REV. O. P. CAMBRIDGE ON N E W DRASSIDES. 381 The eyes are placed in the usual two transverse lines; the hinder row is slightly the longest and straight, the fore one a little curved ; the eyes of the hind central pair appear to be the smallest of the eight, and the fore laterals the largest; the hind laterals are very small and obliquely placed; the four eyes of the hinder row are equidistant from each other ; each hind lateral is separated from the fore lateral on its side by rather less than the diameter of the former ; the fore laterals are large, slightly obliquely placed, of a somewhat oval form; the fore centrals are also large, round, and contiguous to each other, arid each is contiguous to the fore lateral on its side. The legs are rather long and strong, particularly the femoral joints ; their relative length is 1, 4, 2, 3 ; they are of a dark brown colour tinged with olive ; the two basal joints, however, as well as the metatarsi and tarsi, are yellow-brown ; the tarsi of the fourth pair are palest and tinged with red ; they are furnished with hairs; and there are some not very strong spines, principally on the tibiae and metatarsi of the third and fourth pairs. The palpi are short, tolerably strong, and of a yellow-brown colour ; the cubital and radial joints are very short, but of equal length ; the latter has its outer extremity produced into a not very long, tapering, deep- shining brown apophysis, whose pointed extremity curves upwards ; the digital joint is large and of a broadish oval form, its length exceeding that of the radial and cubital joints together. The palpal organs are well developed : they consist of several largish prominent corneous lobes and processes; and a long tapering black spine issues from their fore extremity and forms a bold coil or bend near the middle of their outer side, from which part also there issues another much shorter, curved, prominent, pointed, black spine. The falces are neither very long nor strong ; they project forwards, and, with the maxillae, labium, and sternum (which are all of normal character), are of a dark yellowish-brown colour. The abdomen is oblong-oval in form, and rather flattened ; it is moderately clothed with hairs and of a nearly black colour ; a large patch of a subtriangular form occupies the fore part; this patch is of a rather shining coriaceous nature and deep brown colour; beneath the fore part are some long, strong, upturned, bristly hairs. A single example was found by myself under a stone near Alexandria in April 1864. PROSTHESIMA MOLLIS, sp. n. (Plate LI. fig. 9.) Adult female, length 2f lines. In its general yellow colouring this species resembles P. pallida (postea, p. 383) ; but it may be easily distinguished by the closer grouping of the eyes, the two rows of which, however, are further apart, the hinder row being much more curved ; the spinners of the inferior pair are also much shorter; the legs too are shorter, and the genital aperture differs greatly in form. There is nothing noticeable as different from the normal type in the form of the cephalothorax, except that the lateral constriction of the caput is rather more marked ; it is (as well as the whole of |