OCR Text |
Show 358 REV. O. P. CAMBRIDGE ON NEW SPIDERS. [June 5, THOMISIDA CYRSILLTJS, g. n. (nom. propr.). Cephalothorax oblong, tolerably convex and evenly rounded above; lateral marginal indentation at caput slight; normal grooves and indentations imperceptible. Eyes small, in two transverse rows, occupying the greater part (nearly the whole) of the width of the caput; the anterior row considerably the shortest, slightly, if at all, curved ; the posterior row much more curved; the convexity of the latter curve is directed forwards ; the four central eyes are the smallest, and form a small trapezoid whose anterior side is the shortest; the eyes of the hind-central pair are exceedingly minute and difficult to be seen; the fore-laterals are the largest of the eight. Legs not very long, strong, 1, 2 (or 2, 1?), 3, 4 ; their length is not greatly different from each other, the difference between 1 and 2 is exceedingly slight. The articulation between the tarsi and metatarsi is almost obsolete, being (especially in those of the first and second pairs) almost imperceptible, the faintest possible transverse line alone being visible; as a joint, it can scarcely be of any use ; the length of the tarsus is considerably more than that of the metatarsus. They are furnished with hairs only ; each tarsus ends with two (apparently not dentated) curved claws, and some, somewhat clavi-form, hairs occupy the underside of the anterior portion of the tarsi, but scarcely to be called a scopula. Maxilla. These were not easy to he seen with perfect accuracy owing to some adventitious matter collected about them ; but, so far as they could be observed, they are rather long, narrow, straight, and pointed at the extremities. The labium appeared to be narrow-oblong, about half the length of the maxillae, rather broadest and truncate at the apex. The sternum is oblong-oval, truncate (in a slightly hollow line) at the fore extremity. Abdomen roundish oval, flattish on its upperside, and projecting fairly over the base of the cephalothorax. CYRSILLTJS DRASSIFORMIS, sp. n. (Plate XXXVI. fig. 4.) Adult male, length 2 lines. The cephalothorax is black, thinly clothed with hairs and short bristles, and its surface has a roughened or somewhat pock-marked appearance. The eyes of the hind-central pair are considerably nearer to each other than each is to the lateral on its side ; and this is also the case in resjiect to the anterior row, which is, however, much shorter than the posterior. The height of the clypeus is less than half that of the facial space. The legs are of a deep rich blackish mahogany colour, the femora and genua deeper than the rest. The falces are moderately long, strong, conical, vertical; their |