Mr. J. Blackwall on newly discovered species of Araneidea. 15 



Legs robust, provided with hairs, and two parallel rows of 

 large, sessile spines on the inferior surface of the tibise and me- 

 tatarsi of the tirst and second pairs ; they are of a pale yellowish 

 brown hue, with obscure, dark annuli at the joints ; the fourth 

 pair is the longest, then the first, which a little surpasses the 

 third pair, and the second pair is the shortest ; each tarsus is 

 terminated by two curved claws, below which there is a small 

 scopula. The palpi resemble the legs in colour. Cephalo- 

 thorax large, nearly quadrilateral, thinly clothed with hairs, 

 somewhat glossy, depressed before, abruptly sloped behind, and 

 projects beyond the base of the falces, which are small, conical, 

 and rather inclined towards the sternum : maxillae short, straight, 

 enlarged and rounded at the extremity : lip triangular : sternum 

 oblong heart-shaped. These parts are of a yellowish brown 

 colour ; the sternum is the palest, and the lateral margins of the 

 cephalo-thorax and the region of the eyes have a brownish black 

 tint. Eyes disposed in three rows, constituting three sides of 

 a square, in front and on the sides of the cephalo-thorax ; the 

 intermediate eyes of the anterior row are greatly larger, and the 

 intermediate eye of each lateral row is much smaller than the 

 rest. Abdomen oviform, hairy, moderately convex above, pro- 

 jecting over the base of the cephalo-thorax ; it is of a pale yellow- 

 brown colour, reticulated and streaked with brownish black lines, 

 a series of pale yellow-brown and brownish black angular lines, 

 disposed alternately, and having their vertices directed forwards, 

 extending along the middle of the upper part ; the under part is 

 the least distinctly marked, and the hue of the branchial oper- 

 cula is yellowish white ; the sexual organs have a longitudinal 

 septum in the middle, and their colour is red-brown. 



Specimens of this minute Salticus were found among moss 

 growing in woods on the slopes of Gallt y Rhyg, a mountain 

 near Oakland, in Denbighshire. The female is adult in autumn. 



Family TnoMisiDiE. 



Genus Thomisus, Walck. 



Tkomisus versutus. 



Length of the female ^ih. of an inch ; length of the cephalo- 

 thorax j^Q ; breadth -^-^ ; breadth of the abdomen ^ ; length of 

 an anterior leg W ; length of a leg of the third pair ^. 



Legs provided with short hairs and strong spines, two parallel 

 rows of the latter being conspicuous on the inferior surface of 

 the tibiae and metatarsi of the first and second pairs, which are 

 much longer and more robust than the third and fourth pairs ; 

 the first pair is rather longer than the second, and the third pair 



