83 Mr. J. Blackwall on recently discovered Spiders 



in the middle than at the extremities, convex above, and projects 

 over the base of the cephalothorax ; on the upper part and sides 

 it is densely clothed with coarse, adpressed, reddish, yellowish, 

 and whitish hairs intermixed, and has black and white bristles, 

 more or less erect, distributed over the surface of those parts ; a 

 brownish-black band extends from the anterior extremity of the 

 upper part to its middle ; this band, which is enlarged about its 

 middle, is bifid at its extremity, and from each diverging branch 

 a row of spots of the same hue passes to the spinners ; the sides 

 are marked with oblique brownish-black streaks, and the under 

 part, which is downy, has a very pale dull yellowish hue; the 

 sexual organs are highly developed, prominent, and of a red- 

 brown colour ; the superior spinners are long, triarticulate, and 

 have the spinning -tubes disposed on the inferior surface of the 

 elongated terminal joint, which tapers to a point; this joint has 

 a brownish-black hue on the upper and exterior surfaces of its 

 base, the colour of the other parts of these spinners and of the 

 intermediate and inferior pairs being pale dull yellow. 

 Captured in the Island of St. Jago. 



Family Salticid^. 



Genus Salticus, Latr. 



Salticus simplex. 



Length of the male -fV^^s of an inch ; length of the cephalo- 

 thorax -xV> breadth -^-^ ; breadth of the abdomen -^ ; length of 

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



The legs are robust, especially those of the anterior pair, and 

 are provided with hairs and a few spines; the fourth pair is 

 rather the longest, then the third, and the second pair is the 

 shortest ; they are of a reddish-brown colour, the femora being 

 the darkest, and the tarsi much the palest ; each tarsus is termi- 

 nated by two curved claws, below which there is a small scopula. 

 The palpi are short, and have a dark-brown hue; the radial 

 joint projects a pointed apophysis fx"om its extremity, on the 

 outer side ; the digital joint is oval, convex, and hairy externally, 

 compact at the extremity, concave underneath, at the base, 

 comprising the palpal organs, which are well developed, not 

 very complex in structure, and of a red-brown colour. The 

 minute intermediate eye of each lateral row is nearer to the an- 

 terior than to the posterior eye of the same row. The cephalo- 

 thorax is somewhat quadrilateral, sloping abruptly at the base, 

 and very gradually to the front, which projects a little beyond 

 the base of the falces ; it is of a dark-brown colour, and is clothed 

 with reddish-brown hairs ; a broad patch of yellowish-white or 

 pale yellow hairs is situated below the lateral eyes ; a spot im- 



