456 | 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 Toomisipa. 
Genus THomisus, Walck. 
Thomisus candidus, n. sp. 
Length of the female 52, of an inch; length of the cephalo- 
16 
thorax 1, breadth:; breadth of the abdomen -3,; length of a 
leg of the second pair =2,; length of a leg of the third pair ;3,. 
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 base, the anterior one being the largest, 
and the two intermediate ones of the posterior row the smallest 
of the eight. The cephalothorax is shghtly 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 falces are strong, cuneiform, and vertical; the 
maxillz 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- 
