Mr. J. Blackwall on new species of Lycosa. 287 



sessile spineSj and arc of a uniform pale yellow-brown hue ; the 

 fourth pair is the longest, then the first, and the third ])air is 

 the shortest; each tarsus is terminated by three claws; the two 

 superior ones are curved and pectinated, and the inferior one is 

 inflected near its base. The palpi resemble the legs in colour, 

 and have a curved, pectinated claw at their extremity. The two 

 intermediate eyes of the four forming the anterior row are very 

 conspicuously larger than the lateral ones. The cephalo-thorax 

 is glossy, thinly clothed with hairs, compressed before, depressed 

 and rounded on the sides, which are marked with slight furrows 

 converging towards a narrow longitudinal indentation in the 

 medial line; it is of a pale brown colour, with a yellowish-brow^n 

 band extending along the middle, whose broad anterior extremity 

 compinses a pale brown, bifid line terminating in an angle at the 

 medial indentation ; the lateral margins are supplied with hairs 

 of brilliant whiteness, and the part occupied by the eyes has a 

 dark brown hue. The falces are powerful, conical, and arined 

 with a curved fang at the extremity and teeth on the inner sur- 

 face : the maxillae are short, straight, and enlarged and rounded 

 at the extremity. These parts are of a pale reddish-brown 

 colour. The lip is nearly quadrate, being rather broader at the 

 base than at the apex; it is of a dark brown hue tipped with 

 yellowish-brown. The sternum is heart-shaped and of a pale 

 yellowish -brown colour, with black spots on the margins, opposite 

 to the legs. The abdomen is oviform, rather broader at the pos- 

 terior than at the anterior extremity, sparingly clothed with 

 hairs, convex above, and projects over the base of the cephalo- 

 thorax ; it is of a brown colour, the under part being the palest 

 and the sides the darkest; a yellowish-brown band extends from 

 the anterior extremity of the upper part more than a third of its 

 length, and on each side of the pointed termination of this band 

 there is a brownish-black spot ; between it and the spinners 

 several curved, transverse, brownish- black bars occur, which 

 diminish ia extent as they approach the latter ; they have their 

 convexity directed forwards, their extremities somewhat enlarged, 

 and, .with the two brownish-black spots, have brilliantly white 

 hairs distributed upon them in the form of minute but distinct 

 spots ; a short, curved, white line is directed upwards from the 

 base of each superior spinner, and the sides are densely mottled 

 with white ; the sexual organs are small and of a dark reddish- 

 brown colour, that of the branchial opercula being yellowish- 

 brown. 



An adult female Lycosa jmllipes was taken in Algeria, by the 

 Rev. Hamlet Clark, in the summer of 1856. This species 

 should occupy a place among the semi-aquatic Lycosce, being 

 nearly allied to L. piratica and L. piscatoria. 



