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Show 128 ON N E W GENERA AND SPECIES OF ARENETDEA. [Jan. 21, The caput is produced like that of S. testudo, but enlarges a little the extremity, and is similarly concealed beneath the abdomen; just beneath the eyes is a blunt nose-like prominence, easily visible both from the front and laterally ; this prominence is a strong and distinguishing specific character. The eyes are more unequal in size than in the former species, those of the fore central pair being much the largest. The legs are shorter but relatively the same as in S. testudo, and their colour is pale brownish yellow, in the female annulated with dark yellow-brown. The abdomen is whitish yellow a good deal suffused with brown ; it wants the silvery lustre of A testudo, and is covered more or less with round brownish shallow pock-marks ; its surface is also thinly clothed with short hairs; and there is a largish somewhat lyre-shaped brownish patch in the centre of the hinder portion. The palpi are short and strong ; the digital joints are large and oval in form, with a strong indentation at the base on the outer side, and their convex sides are directed towards each other; the radial and cubital joints appeared to be very nearly of the same length ; the palpal organs are simple, and, as far as they could be seen, consisted of two or three simple corneous lobes. An adult male and female of this species were received from Ceylon, from Mr. Thwaites, at the same time as the former one. LIST OF SPECIES, WITH REFERENCES TO PAGE, PLATE, AND FIGURES. Tetrablemma medioculatum (Cambr.), Ceylon, p. 114, Plate XII. fig. 1. Pachypus macleayi (id.), ibid., p. 116, Plate XII. fig. 2. Labdacus monastoides (id.), Rio Grande, p. 118, Plate XII. fig. 3. Thomisus prosper (id.), hab. ign., p. 119, Plate XIII. fig. 4. • opportunus (id.), Ceylon, p. 120, Plate XIII. fig. b. Amycle forticeps (id.), ibid., p. 122, Plate XIII. fig. 6. Phoroncidia thwaitesii (id.), ibid., p. 123. brevispinosa (id.), ibid., p. 124, Plate XIV. fig. 7. septemaculeata (id.), ibid., p. 124, Plate XIV. fig. 8. trispinosa (id.), ibid., p. 125, Plate XIV. fig. 9. Stegosoma testudo (id.), ibid., p. 126, Plate XIV. fig. 10. nasutum (id.), ibid., p. 127, Plate XIV. fig. 11. DESCRIPTION OF THE PLATES. PLATE XII. Fig.l. Tetrablemma medioculatum (Cambr.), <$. a, figure of Spider, magnified ;• b, profile of ditto, with legs and palpi truncated ; c, underside, without legs and palpi; d. abdomen, from behind ; e, eyes, from above and behind; /, left palpus, from beneath and behind ; g, right palpus, from beneath and in front; h, natural length of Spider. 2. Pachypus macleayi (Cambr.), $ & <*>. a, Spider, magnified ; b, ditto in profile; c, underside of abdomen ; d, cephalothorax and falces from the front; e, underside showing maxilla?, labium, and sternum ; /, leg of first pair; g, tarsus of legs of fourth pair; h, portion of leg of first pair, showing fringes of hairs; k, tarsus of leg of first pair; m, palpus of J ; n, natural length of Spider. |
