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Show 1873.] REV. O. P. CAMBRIDGE ON SIBERIAN SPIDERS. 447 The legs are long and rather slender ; their relative length appears to be 4, 1, 2, 3; they are of a dullish yellow colour, furnished sparingly with hairs, and a very few prominent but short bristles, several of which have a slender spine-like character. The palpi are short, tolerably strong, and similar to the legs in colour. The cubital joint is straight and cylindrical in form ; it is three times the length of the radial joint, which is very short, and spreads out prominently but obtusely both in front and on the outer and inner sides; from the extremity on the outer side there issues a rather slender, pale, sinuous, corneous apophysis, and a very small pointed tooth-like projection at the fore extremity. The digital joint is of moderate size and of an oval form, obtusely rounded at its extremity ; the palpal organs are well developed and complex, consisting of several corneous spines and processes, but none of a very remarkable character. The falces and maxillae are similar in colour to the cephalothorax. The labium is short, rounded at its apex, and transversely impressed across the middle ; it is rather darker-coloured than the maxillae. The sternum is dark blackish brown, of a heart-shape, convex, and very glossy. The abdomen is oval and not very convex above; it is of a dark blackish-brown colour, thinly clothed with hairs, and (visible in spirit of wine) with pale yellowish lines and markings on the upperside and spots arranged in sinuous longitudinal lines on the sides. This interesting Spider was contained in the Siberian collection received from M . Taczanowski; and I have great pleasure in naming it after Professor Waga, of Warsaw, an eminent entomologist, whose acquaintance I was fortunate enough to make at Assouan, in Upper Egypt, in March 1864. ERIGONE (WALCKENAERA) KARPINSKII, sp. n. (Plate XLI. fig. 12.) Adult male, length 1| line. This Spider is closely allied to Erigone cuspidata, BL, E. unicornis (Cambr.), and E. kochii (Cambr.) ; like them all it has a small vertical eminence rising from the middle of the ocular area. It m ay be distinguished readily from the first not only by the much greater strength of this eminence, but by its being enlarged and hollowed or notched at its apex. From E. unicornis it m ay be distinguished also by the greater strength of the eminence and the notch being much shallower, as well as by differences presently to be noted of the palpal structure; while in E. kochii the eminence, though less proportionally strong, is higher and more distinctly notched than in either of the others, so that the apex has, in fact, two distinct limbs or branches, the extremity of each of which is hollowed out, and the palpal structure is also different from that of the other two species. The cephalothorax is of ordinary form, its profile presenting an almost unbroken slope from its base to the eminence between the |