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Show 340 REV. O. P. CAMBRIDGE ON SPIDERS [Api*. 20, hinder part of each side, leaving a broad silvery band from the apex to the spinners. Examples, for the most part much damaged, were found in Prof. Traill's Amazons collection in company with those of A. obtusa. ARGYRODES INFELIX, sp. n. (Plate XXX. fig. 18.) Adult female, length to the spinners 1^ line, and to the apex of the abdomen very nearly 2 lines. The cephalothorax is of a very flattened convex form above ; the ocular area is a little elevated, and the clypeus (which in height is no more than half that of the facial space) is rather prominent; the profile line of both the caput and thorax is very level, and forms but a very slight curve ; the ordinary lateral converging indentations are obsolete, and the thoracic indentation is but very slightly marked. The surface of the whole is roughened or granulose, covered with small impressed points, and clothed with pale coarse hairs ; its colour is yellow-brown. The eyes are in the ordinary position; the four centrals form a square, those of the hind central pair are slightly closer to each other than each is to the hind lateral eye on its side, while the intervals between those of the anterior row appeared to be equal to each other. The falces, maxillee, labium, and sternum are of normal form, and similar to the cephalothorax in colour. The legs are moderately long, slender, 1, 2, 4, 3, rather paler in hue than the cephalothorax, and clothed with rather long coarse hairs. The palpi are short and slender ; they resemble the legs in colour, are similar in their armature, and terminate with a curved claw. The abdomen has its posterior extremity produced in a tapering form to an obtusely conical apex. It is of a dull luteous yellow-brown hue, with some faint traces of red-brown markings on the upper-side, and thinly clothed with coarse hairs ; the plates of the spiracles are reddish yellow-brown ; and the genital aperture is small, inconspicuous, and has no process connected with it. A single example of this species was contained in Prof. Traill's Amazons collection. Although it presents some rather abnormal characters, I consider it to belong to the genus Argyrodes. Probably the abdomen, in the only example before me, had lost its real colour; and its markings had perhaps become obliterated; still the peculiar characters furnished by the form and surface of the cephalothorax will hardly fail to enable the species to be easily determined. ARGYRODES FELIX, sp. n. (Plate XXX. fig. 19.) Adult female, length to the extremity of the abdomen 2\ lines, and to the spinners 1^-. The cephalothorax, legs, palpi, and falces of this pretty Spider are yellow-brown. The legs are moderately long, 1, 2, 4,'3, and furnished with fine hairs only. |
