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Show 822 RBV. O. P. CAMBRIDGE ON SINAITIC SPIDERS. [Dec. 6, remaining two issue from the hinder portion of the abdomen ; they are about the length and strength of the two foremost, and are rather divergent from each other ; all of them have a slight tendency upwards and are furnished rather thinly with bristly hairs: the fore margin, between the two foremost spines, is curved and indented in the middle ; parallel with it is a row of the usual ten round impressed punctures, two others are behind each of the intermediate spines, a transverse row of five occupies the hinder margin, and four in a trapezoid, widest behind, occupy the centre ; the upperside is of a bright rich orauge-yellow, with two broad parallel transverse bauds of blood-red tinged with carmine, connecting each of the fore pairs of spines in which they meet, the spines being strongly suffused with deep red-brown; one indistinct narrow transverse bar of cinnabar-red connects the hind marginal row of impressed spots ; and the bases of the two hinder spines, with a considerable portion of the immediately surrounding surface, are also of the same blood-red colour. The abdomen might almost be described as alternately barred, on the upperside, with transverse bars of red and yellow ; the underside is bright yellow, strongly striated and intersected with black, going off into red near the spines ; the spinners are black ; and between them and the epigyne is a conical, prominent, corneous-looking, shining prominence which is also of the same colour. A single example of this species was captured in a geometric web in a mangrove-swamp, inland from Massowah ; it is allied closely to Gasteracantha sanguinolenta (Koch), hut may easily be distinguished by the greater proportional breadth of the abdomen and the greater length of the spines with which it is armed. Family LYCOSIDES. Genus LYCOSA. LYCOSA PRAELONGIPES, n. sp. (Plate L. fig. 3.) Male adult, length 3^ lines, length of a leg of the posterior pair nearly 12 lines. This Spider is almost entirely of a brightish sandy-yellow colour ; the cephalothorax has two broad longitudinal lateral brown bands having a yellow lateral margin on each side, and a broad central one ; the last strongly constricted or indented near the middle at the junction of the caput and thorax, and enlarged at the middle of the thoracic portion, narrowing again at its posterior extremity ; the region of the eyes is blackish, and the whole of the cephalothorax is thinly furnished with greyish hairs ; the form of the cephalothorax is peculiar, the normal, lateral, oblique indentations which indicate the junction of the caput and thorax being very strong and forming a marked constriction, the thoracic portion being rounded (and, indeed, somewhat gibbous) in consequence, and leaving a dip or hollow between its highest point and the ocular region. The four hinder eyes are unusually large, and form very nearly a square, the two foremost being the largest; the two centrals of the |