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Show 1873.] REV. O. P. CAMBRIDGE ON SIBERIAN SPIDERS. 443 A single adult male was contained in M. Taczanowski's Siberian collection. ERIGONE (NERIENE) SOLLERS, sp. n. (Plate XLI. fig. 8.) Adult male, length 1^ line. In the somewhat cylindric elongate general form of this Spider there is great similarity to E.fugax (Cambr.); it also resembles that species in the richness of the orange yellow-red colour of the legs, and the deep glossy yellow-brown cephalothorax; this part is of an elongate-oval form, but very slightly impressed laterally forwards, and rather flattened, or much less convex above than many other species; the sides appeared under a lens to be finely rugulose or striated, the caput being perfectly smooth; the height of the clypeus equals half that of the facial space. The eyes are in the ordinary position, not very large or greatly unequal in size ; those of the hinder row are about equally separated from each other; those of the fore central pair are contiguous to each other, and equal in size to those of the hind central pair; the fore laterals being rather the largest of the eight. The legs are tolerably strong, not very long; their relative length is 4, 1, 2, 3; they are of a rich reddish orange-yellow colour, furnished thickly with strongish hairs and a few fine short erect bristles. The palpi are short. The radial joint is rather shorter and much stronger than the cubital; its fore extremity on the upperside is produced into a long, strongish, tapering, curved apophysis with a truncated extremity, which is directed outwards; from within the curvature of this apophysis, and apparently springing from underneath the joint, is another slightly curved apophysis. The radial joint is also rather obtusely prominent at its fore extremity on the other side, and more pointedly so behind. The digital joint is large ; and the palpal organs are well developed, rather complex, and towards their extremity on the outer side is a strongish, black, filiform, tapering spine, coiled in a circular form. The sternum is convex, very glossy, and of a deep yellow-brown colour, furnished with a few fine bristly hairs. The abdomen is elongate-oval, hairy, and of a greenish black-brown colour, with four slightly impressed dots in a quadrangle about the middle of the upperside ; and, besides numerous yellowish points over its surface, several transverse angular lines are visible (when in spirit of wine) on the hinder half of the upperside; the spinners and plates of the spiracles are yellow. A single adult male of this very distinct species was contained in M . Taczanowski's collection, found by himself at Kiew, in Poland. ERIGONE (NERIENE) INTERCEPTA, sp. n. (Plate XLI. fig. 9.) Adult male, length 1\ line. The cephalothorax is very glossy and of a dark yellow-brown colour ; looked at from above, and rather behind, it is of a regular oval form, rather broadest behind, and without lateral constriction |