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Show 582 REV. O. P. CAMBRIDGE ON EGYPTIAN SPIDERS. [Julie 20, of the caput; and the abdomen (which projects well over the base of the cephalothorax) is of a very short, broad, oval shape, obtusely pointed behind and slightly truncate before. The sides of the cephalothorax are thickly mottled with pale red-brown and yellow; the usual broad central longitudinal pale band, charged on its fore part with the normal spade-shaped marking, is yellowish red-brown, mottled finely with yellowish and fairly defined, at least at its hinder part, which is prolonged in a dark red-brown line down the hinder slope. The leys are normal in respect of length and strength; they are marbled and streaked more or less coarsely with white, yellowish, and red-brown spots and blotches, and armed with spines, those on the tibiae and metatarsi of the first and second pairs being rather long and strong ; the metatarsi and tarsi are pale yellow, striped longitudinally with white. The palpi are short and strong, of a pale yellow-brown colour, mottled faintly with whitish and darker brown : the radial joint is shorter than the cubital, and has its outer fore extremity produced into a short, tapering, bluntish-pointed apophysis, and a much larger one on its underside ; this latter is broad and truncated at its extremity, which is broader than its base ; the other (towards the inner side) is pointed : the digital joint is of a short oval form, with the usual apophysis issuing from near its base on the outer side. The palpal organs are very similar to those of X. audax, but may be easily distinguished by the form of the J-shaped spine: this in the present species is of a generally slenderer form, and has its shaft strongly bent, whereas in X. audax it is nearly or quite straight; the inner one of the cross bars also is longer in proportion to the other than in that species. The large pointed corneous process which issues from the inner side of the base of the palpal organs is also destitute of the thorn-like spine near the base of its lower edge, which is very conspicuous in X. audax and also in X. cristatus ; in some respects this Spider appears to be more nearly like the latter in the palpal organs than the former; but whereas in X. cristatus the surrounding spine has its fine point always (so far as I have seen) straight, this in the present Spider is curved. The falces are short, strong, subconical, and of a yellowish white colour, marked with red-brown, principally at the base and extremities. The sternum is yellow-white, thickly speckled with pale purplish red-brown spots ; and two oblique lines of the same colour are faintly visible on each side, with a similar short central line from the hinder extremity. The abdomen is thinly clothed with erect bristles, and has its upper-side of a pale chocolate red-brown colour, marked with a few black spots, chiefly near the margins, which are whitish and rugulose ; the usual broad dentated band along the centre is visible and of a whitish colour, but greatly obscured by minute chocolate red-brown spots, the extreme points of the denticulations being the least obscured ; about the middle of the denticulated band is a small, narrow, yellow |