414 MB. J. BLACKWALL ON SOME TUSCAN SPIUKUS. 



directed forwards, on its posterior half ; the sides and under i)art are 

 clothed with yellowish-grey hairs, and have a dull yellowish hue ; the 

 former are densely streaked longitudinally with dark-brown, and the 

 latter is the darkest in the middle j the sexual organs are well deve- 

 loped, and of a brown colour, 



Salticus obnixus, n. sp. PI. XV. fig. 6. 



Length of female | in, ; length of the cephalotliorax ^o, breadth Jg '> 

 breadth of the abdomen -jV 5 length of a posterior leg ^j ; length of 

 a leg of the second pair -jV- 



The legs are provided with hairs and spines, the first and second jiairs, 

 which are the most robust, having two parallel rows of the latter on 

 the inferior surface of their tibia; and metatarsi ; the metatarsi and 

 tarsi are of a brownish-yellow colour, the former having a dark-brown 

 annulus at their extremity, and the other joints of these limbs have a 

 dark-brown hue more or less tinged with red, particularly on their 

 superior surface; the first j)air is rather the longest, then the third, 

 and the second pair is the shortest ; each tarsus is terminated by two 

 curved, minutely pectinated claws, below which there is a small 

 scopula. The palpi are of a dark-brown colour marked with red, 

 particularly on the upper surface of the humerus and at the extremity 

 of the digital joint, and the radial and digital joints are supplied with 

 long hairs. 'J'he cephalotliorax is large, glossy, somewhat quadri- 

 lateral, projecting a little beyond the falces in front, sloping abruptly 

 at the base, and has a depression near the middle ; it is of a very 

 dark brown colour slightly tinged with red, and has a broad, dull red- 

 brown, transverse band immediately behind the medial depression, 

 which extends below each lateral row of eyes. The falces are short, 

 conical, vertical, convex in front, armed with a few teeth on the inner 

 surface, and of a red-brown colour. The maxilla; are straight, and 

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

 organs have a dark-brown hue, that of their extremities being 

 yellowish-brown. The sternum is oval, and of a pale yellow colour, 

 with dark -brown margins. The minute intermediate eye of each 

 lateral row is nearly equidistant from the eyes constituting its extre- 

 mities. The abdomen is oviform, glossy, convex above, and projects 

 over the base of the cephalotliorax ; it is of a black hue thickly 

 streaked and spotted with yellowish-white ; at the anterior extremity 

 of the upjier part there is a broad, slightly curved, yellowish-white, 

 transverse band, immediately behind which, on each side of the 

 medial line, there is a short irregular streak of the same hue, whose 

 posterior extremity is bifid ; to these streaks succeeds a series of im- 

 perfectly defined, yellowish-white, angular lines, whose vertices are 

 directed forwards, the anterior one being the largest ; and there is a 

 conspicuous oblique spot of the same hue on each side of the posterior 



