captured in Rio Janeiro. 359 



spinners, and under part are of a brownish-black colour, the last 

 having a pale yellowish-brown hue in the middle of the anterior 

 part, which is clothed with whitish hairs. 



Salticus minax. 



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

 thorax ^ ; breadth ^ ; breadth of the abdomen ^ ; length of a 

 posterior leg f ; length of a leg of the second pair -f^. 



The cephalothorax is large, glossy, sparingly clothed with 

 hairs, somewhat quadrilateral, and slopes abruptly at the base ; 

 it is of a dull yellow colour, the region of the eyes and a broad 

 longitudinal band on each side, which tapers to its posterior 

 extremity, having a dark red-brown hue ; the colour of the 

 narrow lateral margins is dark brown, and the frontal margin is 

 fringed with long yellowish-white hairs. The minute inter- 

 mediate eye of each lateral row is nearly equidistant from the 

 eyes constituting its extremities. The falces are short, powerful, 

 conical, convex at the base, vertical, and armed with teeth on 

 the inner surface ; the maxillse are straight, and enlarged and 

 rounded at the extremity ; and the lip is short and oval. These 

 organs have a red-brown colour, the base of the falces and the 

 extremities of the maxilla? and lip being the palest. The sternum 

 is oval ; and the digital joint of the palpi, which is rather long 

 and well supplied with hairs, is without a claw at its extremity. 

 These parts have a pale dull yellowish hue. The legs are robust, 

 and provided with hairs and sessile spines, two parallel rows of 

 the latter occurring on the inferior surface of the tibiae and 

 metatarsi of the first and second pairs ; the fourth pair is the 

 longest, then the third, and the second pair is the shortest ; 

 each tarsus is terminated by two curved minutely pectinated 

 claws, immediately below which there is a small scopuia ; they 

 are of a dull yellow colour, obscurely marked with brown ; a 

 smail dark brown annulus occurs at the extremity of each meta- 

 tarsus, and the tibiae of the anterior pair have a dark brown hue, 

 except at the extremity. The abdomen is oviform, pointed to- 

 wards the spinners (which are prominent), somewhat depressed, 

 and projects over the base of the cephalothorax ; it is densely 

 covered with hairs, and is of a yellow-grey colour, a broad band 

 of a paler hue, whose lateral margins are somewhat sinuous and 

 obscurely bordered with black, extending along the middle of 

 the upper part ; near the middle of the band there is a black 

 mark in the form of a W, which is succeeded by faint, curved, 

 transverse bars of a yellow-brown colour ; they decrease in length 

 as they approach the spinners, and their convexity is directed 

 forwards ; the sides are thickly spotted with brown ; and on the 

 under part there are three dark brown lines forming three sides 



