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Show 1877.] REV. O. P. CAMBRIDGE ON NEW ARANEIDEA. 559 adds another to the numerous generic, or subgeneric, forms of the genus Salticus, Latreille. It has a close affinity to Lyssomanes, Hentz ; but its differences from that, as well as from another allied genus, Jelskia, Tacz., appear to me to warrant its being made the type of a separate group. Fam. GASTERACANTHIDES. Gen. CYRTARACHNE, Thor. CYRTARACHNE LONGIPES, sp. n. (Plate LVI. fig. 1.) Adult female, length nearly 7 lines. It is with great hesitation that I include the present West- African Spider in the genus Cyrtarachne, differing, as it does, from the typical species in the greater length and slenderness of the first and second pairs of legs, as well as in the higher eye-eminences. The form, however, of the maxillae and labium is similar; and as the three long and remarkable spines on the cephalothorax are represented in some (if not in all) of the typical Australian species of Cyrtarachne, I have thought it best to place it provisionally with them until perhaps other species from West Africa may prove it to belong to a group specially characterized by the peculiarities noted, and so to require a separate genus for their reception. The cephalothorax of this Spider is broad and rounded behind, much narrower in front, and strongly constricted laterally at the caput. The occipital region is gibbous and has three long, strong, pointed, tapering, nearly erect spines in a line along the middle. These spines are almost straight, but rather divergent; the central one is the longest, and the anterior the shortest. Its colour is yellow strongly tinged with brownish orange on the caput, and covered with a fine, silky, whitish pubescence. The three spines are also similarly clothed; and their basal portion is similar to the caput in colour, their upper part being of a deep blackish red-brown. The eyes are very small, and of an amber-colour; they are seated on three strong, somewhat tuberculiform eminences placed in a transverse line at the fore part of the caput. The central eminence (which is much the largest and highest) has four eyes near its summit, in the form of a quadrangle, whose transverse is rather longer than its longitudinal diameter ; the two posterior eyes of these four are the largest of the eight. The eyes of each lateral pair are placed contiguous to each other near the upper extremity, on the outer sides of the lateral eminences. The legs are rather slender, and differ considerably in length; those of the first pair are much the longest; next to them are those of the second pair; and the third pair are a good deal the shortest. They are of a dull yellow colour, the femora tinged with orange, and (excepting these joints) unequally annulated with dull reddish brown; they are also furnished with numerous long, prominent, fine, silky, whitish hairs, but no spines; and each tarsus terminates with three rather sharply bent claws, the two superior ones pectinated at their base. The tibiee are gradually enlarged at their anterior extremities. |