SALTICUS. 
61 
the least distinctly marked, and the hue of the branchial opercula is yellowish-white; the 
sexual organs have a longitudinal septum in the middle, and their colour is red-brown. 
The male is smaller and rather darker coloured than the female. The cubital and radial 
joints of its palpi are short; the latter projects a small apophysis from its extremity, on the 
outer side, and is fringed with long hairs on the inner side; the digital joint is oval, convex 
and hairy externally, concave within, comprising the palpal organs, which are highly 
developed, remarkably prominent, the base extending to the articulation of the radial with the 
cubital joint, not very complicated in structure, and are of a dark-brown colour, slightly tinged 
with red. 
Specimens of this minute Salticus were found among moss growing in woods on the 
slopes of Gallt y Rhyg, a mountain near Oakland. Both sexes are adult in summer. 
Salticus Jenynsii. 
Salticus Jenynsii, Blackw., Annals and Mag. of Nat. Hist., second series, vol. xiii, 
p. 174. 
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. xiv, 
p. 29. 
Length of the female, f 5 ths of an inch ; length of the cephalo-thorax, ±th, breadth, T ktli; 
breadth of the abdomen, ^th; length of an anterior leg, 1th; length of a leg of the third 
pair, ^ths. 
The legs are robust, especially those of the first and second pairs, and are provided with 
hairs and strong, black, sessile spines; their colour is yellowish-brown, a longitudinal, black 
line extending along the upper part of the femora, genua, and tibiae ; the anterior and posterior 
pairs are the longest and of equal length, and the third pair is the shortest; each tarsus is 
terminated by two curved claws, below which there is a scopula. The palpi have a yellowish- 
brown hue, the digital joint being the darkest. The cephalo-thorax is nearly quadrilateral, 
prominent in front, projecting beyond the base of the falces; it is covered with yellowish- 
brown and black hairs intermixed, and has some long, yellowish ones below the anterior row 
of eyes; a narrow, black line occurs on the margins, immediately above which there is a 
longitudinal one of a yellowish-brown hue. The falces are short, powerful, conical, and 
vertical; the maxillae are straight, and enlarged and rounded at the extremity; and the lip is 
somewhat oval. These parts have a yellowish-brown tint, with the exception of the bases of 
the maxillae and lip, which have a dark-brown hue. The sternum is small, oval, and of a 
brown colour, the margins being much the darkest. The abdomen is oviform, pointed at the 
spinners, convex above, projecting over the base of the cephalo-thorax; it is densely clothed 
with short, yellowish-brown hairs, interspersed with long, black ones; a faint, red-brown line 
passes from the spinners along the middle of the upper part, more than half of its length, and 
then separates into two diverging branches, which extend to its anterior extremity and form a 
very acute angle; these red-brown lines have an obscure, narrow, whitish border, bounded 
