466 Mr. J. Blackwall on new Species of Spiders 



short fine line in the middle of the under part^ a rhomboidal 

 spot near its extremity, and the superior pair of spinners have a 

 dark-brown hue : the sexual organs are well developed, have a 

 dull pale-yellow septum in the middle, and are of a red-brown 

 colour. 



Two females of this remarkable Salticus were comprised in the 

 collection, one of which was adult, and the other immature. It 

 appears to have a near relation of affinity to the Attus bos of 

 Sundevall, * Conspectus Arachnidum,' p. 27. 



Family Thomisid^. 

 Genus Thomisus, Walck. 

 Thomisus candidus, n. sp. 



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

 thorax ^, breadth-f; breadth of the abdomen -;%; length of a 

 leg of the second pair -^ ; length of a leg of the third pair -^. 



The abdomen is broad, oviform, somewhat pointed at the 

 spinners, corrugated on the sides, glossy, convex above, project- 

 ing over the base of the cephalothorax, and has a white hue ; a 

 transverse line in front of the upper part, two transverse sinuous 

 lines situated above the spinners, the anterior one being the 

 longer, two spots on each side of the medial line, describing a 

 large quadrilateral figure, whose shortest side is formed by the 

 anterior pair, which are much the smallest, two spots on each 

 side of the posterior extremity, the coccyx, and the upper sur- 

 face of the two superior spinners are of a dark red-brown colour: 

 the sexual organs, which are not highly developed, have a red- 

 brown hue ; and a row of minute, indented, pale-brown spots, 

 on each side of the medial line of the under part, extends to the 

 spinners, where the two meet. The eyes are disposed on the 

 anterior part of the cephalothorax in two transverse, slightly 

 curved rows, forming a crescent whose convexity is directed 

 forwards ; the eyes of each lateral pair are seated on white tu- 

 bercles united at their basCj the anterior one being the largest, 

 and the two intermediate ones of the posterior row the smallest 

 of the eight. The cephalothorax is slightly compressed before, 

 truncated in front, rounded on the sides, very convex near the 

 middle, depressed at the base, gradually sloped to the front, and 

 glossy ; the fakes are strong, cuneiform, and vertical ; the 

 maxillse are enlarged where the palpi are inserted, obliquely 

 truncated at the extremity, on the outer side, and inclined to- 

 wards the lip, which is triangular, but rounded at its apex ; the 

 sternum is heart-shaped ; the legs are provided with a few 

 spines ; the first and second pairs are longer and more robust 

 than the third and fourth pairs, the second pair rather surpass- 



