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Show 1870.] REV. O. P. CAMBRIDGE ON NEW ARANEIDEA. 733 peculiar and almost unique powerful claws or talons at the extremity of the digital joints of the palpi. Fam. THERIDIDES. Nov. gen. SPHECOZONE (ercpri^, a wasp, £iovn, waist). Characters of the Genus.-Cephalothorax separated from the abdomen, to which it is joined by a distinct stem or pedicle; caput rather elevate ; clypeus impressed below the eyes. Legs long and slender; relative length 4, 1, 2, 3,-4 and 1 being nearly equal; each tarsus ends with three claws, the palpus in the female being without any terminal claw. Eyes not very unequal in size, situated in two transverse curved rows (or four pairs) on upper fore margin of caput; those of each lateral pair are contiguous to each other and seated on a slight tubercle ; those of the two central pairs form an oblong figure, whose fore side is much the shortest. Maxillee moderately long, nearly straight, but considerably inclined towards the labium, dilated at their bases, and somewhat pointed at extremities on inner side. Labium short, small, and apparently nearly semicircular in form. SPHECOZONE RUBESCENS, n. sp. (Plate XLIV. fig. 3.) Male adult, length 1| line; female adult, 2 lines. The cephalothorax, falces, maxillee, labium, sternum, and part of the femora of the legs are of a bright red-brown, tinged with orange ; the rest of the legs, the palpi, and (in the female) the caput, falces, maxillae, and labium are strongly suffused with black. The abdomen is of a bright pinkish or cinnamon-red, the colour of the petiole by which it is joined to the cephalothorax being similar to that of this latter part; the abdomen is oblong-oval in the male, but shorter and more convex in the female ; it is glossy, sparingly clothed with fine hairs, and has 4-5 slender, pale angular lines or chevrons in a longitudinal series, spanning the hinder half of the upperside; these lines are probably very indistinct, even if visible at all, when alive, but are sufficiently well-marked when in spirit of wine; the hinder extremity of the abdomen is tipped with black ; and the spinners are of a dusky yellow-brown colour, suffused with blackish; the form of the cephalothorax is oval, the caput being raised above the level of the thorax ; the clypeus is high, its height considerably exceeding the length of the space occupied by the four central eyes, and nearly (if not quite) equal to the length of the line formed by the first row. The legs are sparingly furnished with hairs and a few slender nearly erect bristles. The palpi are moderate in length, the humeral and cubital joints being slender, the latter short; the radial joints are large and of very peculiar form, difficult to describe and best conceived from the figures ; they are of an irregular cup- or calyx-shape, with the digital |