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Show 526 REV. O. PtCKARD-CAMBRlD&E ON [Apr. 18, spicuous large prominence, white before, black behind, with others, smaller, both along the margin and side, before and behind it, and a row round the fore margin; there are also many much smaller tubercles over the surface, arranged somewhat symmetrically. The general colour of the abdomen above and on the sides is yellow-brown mixed with black-brown, black, and white; and between the anterior prominences of the central quadrangle is an elongate longitudinal white marking divided longitudinally by a dark-brown line, and on each side of its hinder end is a shining dark-brown tubercle. Spinners short, strong, very compact, and of a yellow-brown hue. Hab. Ceylon. Beceived from the late M r . G. H . K. Thwaites. TALAUS OBLITUS, sp. n. (Plate XXX. fig. 8.) Adult male, length slightly over lg lino (or nearly 3 mm.). Cephalothorax a little longer than broad ; somewhat subquadrate, the anterior side a little rounded, the posterior rather impressed and nearly as long as the anterior. Upper surface regularly convex, the normal grooves, indentations, and lateral impressions at the caput obsolete ; height of clypeus less than half that of the facial space, and its profile follows the general slope of the fore part of the caput. The surface of the cephalothorax is covered, especially on the sides, with impressed spots or pock-marks, and with scattered, strong, erect spiny bristles issuing from transparent tubercles ; these bristles, however, terminate in a curved transverse line at the upper part of the hinder slope. Its colour is a brightish yellow-brown. Eges in two very strongly curved lines, their convexity directed forwards (the posterior curve stronger) and occupying very nearly the whole width of the caput, or perhaps they may be more conveniently described as in three groups-a central quadrangle of four minute eyes broader than long, w ith its anterior side shorter ; at a distance considerably greater than the space between the posterior eyes of the quadrangle and on each side of it, are two much larger eyes (the anterior the larger) in a slightly oblique longitudinal line, seated on a strong common prominence, and separated from each other by double the diameter of the posterior eye. The posterior eyes of the quadrangle with the anterior eyes of the lateral pairs form a very slightly curved line, the convexity of the curve directed backwards. Legs moderately long, slender, 2-1-4-3, 2 and 1 much longer but not very different in length. They are furnished with long slender prominent bristles, a few of which are spiniform, and irregularly disposed. The femora are somewhat grauulose or furnished with some minute tubercles ; they have neither scopula nor terminal claw-tuft. The terminal claws are strong, those of the first and second pairs closely set with long pectinations, while tbe pectinations of those of the third and fourth pairs are short and fewer. The colour of the legs is similar to that of the cephalothorax. Fakes rather long, strong, conical, the anterior part somewhat |