358 Mr. J. Blackwall on newly discovered Spiders 



Salticus festinus. 



Length of the male £th of an inch ; length of the cephalo- 

 thorax £ ; breadth ^ T ; breadth of the abdomen ^ ; length of 

 an anterior leg ^j ; length of a leg of the second pair j. 



The legs are robust, and provided with hairs and sessile spines; 

 the first pair is the longest, then the fourth, and the second pair 

 is the shortest ; each tarsus is terminated by two curved pecti- 

 nated claws, immediately below which a small scopula is situated ; 

 their colour is brownish-black, with the exception of the tarsi, 

 which have a reddish-brown hue, and a longitudinal line on the 

 upper surface of the femur, a spot near the middle of the tibia, 

 and another at the base of the metatarsus consisting of brilliant 

 white hairs. The palpi are short, strong, and resemble the legs 

 in colour, white hairs occurring on the upper surface of the 

 humeral joint at its extremity, and on the cubital joint; the 

 radial joint is supplied with long black bristles on the under 

 side, and has a pointed apophysis at its extremity on the outer 

 side ; the digital joint is subcylindrical, convex and hairy exter- 

 nally, concave within, comprising the palpal organs, which are 

 highly developed, not very complicated in structure, protuberant 

 near the base, and are of a dark brown colour. The cephalo- 

 thorax is large, glossy, somewhat quadrilateral, sloping abruptly 

 at the base, and projecting a little beyond the falces in front ; 

 its colour is brownish-black, with a broad band on the posterior 

 half of the lateral margins, a spot in the medial line, at the 

 commencement of the posterior slope, another contiguous to the 

 minute intermediate eye of each lateral row, and a transverse 

 line on the frontal margin consisting of brilliant white hairs. 

 The minute intermediate eye of each lateral row is nearly equi- 

 distant from the eyes constituting its extremities. The falces 

 are short, conical, and vertical ; the maxillse are straight, and 

 enlarged and rounded at the extremity ; the lip is oval ; and the 

 sternum is oval, being rather broader at the posterior than at 

 the anterior part, and is clothed with whitish hairs. These parts 

 have a brown-black hue, the extremity of the maxillse being the 

 palest. The abdomen is oviform, pointed towards the spinners 

 (which are prominent), convex above, projecting over the base of 

 the cephalothorax, and is densely covered with hairs ; the upper 

 part is of an orange-red colour, with four brilliant white spots 

 disposed in a row in the medial line of the posterior half, the 

 two intermediate ones being much the smallest, and the anterior 

 one the largest ; a white band, curved round the anterior extre- 

 mity, extends along each side more than half its length, and a 

 detached white spot occurs near its termination ; the sides, 



