90 Mr. J. Blackwall on recently discovered Spiders 



legs are of a brownish-black hue, the inferior surface being 

 much the palest ; a pale yellowish annulus occurs on the first, 

 and is situated nearer to its extremity than to its base, which is 

 the darkest-coloured ; the metatarsi and tarsi are disproportion- 

 ally slender, and have a brownish-yellow hue ; the second, third, 

 and fourth pairs of legs are of a pale brownish-yellow colour, 

 marked with brownish-black annuli. The palpi are short, hairy, 

 and of a pale brownish-yellow colour, the, extremity of the hu- 

 meral joint, the cubital joint, and the base of the radial joint 

 having a brown-black hue. The abdomen is oviform, pointed at 

 the spinners, convex above, with a conical protuberance on each 

 side of the upper part, near its anterior extremity, and projects 

 over the base of the cephalothorax; the upper part is of a pale 

 yellowish colour, a fine black line, which is rather the broadest 

 near its anterior extremity, extending along the middle ; a space 

 above the spinners, the sides, and under part are strongly tinged 

 with brown, a spot of a darker hue occurring on each side of the 

 latter nearly midway between the branchial opercula and the 

 spinners ; the sexual organs are moderately developed, and have 

 a brownish-yellow process directed backwards from their anterior 

 margin : the spinners are eight in number ; those constituting 

 the inferior pair, which are the shortest, consist of a single joint 

 each, and are united throughout their entire length. 



Two adult females of this species were taken in the Island of 

 St. Nicholas. 



Orithyia gnava. 



Length of the female -3-th of an inch ; length of the cephalo- 

 thorax iV> breadth -^; breadth of the abdomen -j^; length of 

 an anterior leg ■£? '> length of a leg of the third pair ■£. 



In the relative size and disposition of its eyes, also in the 

 relative length and proportions of its legs, and in its general 

 structure, this species is similar to Orithyia luteola. The ce- 

 phalothorax has a black hue, a short longitudinal streak in the 

 middle, and a triangular mark at the base, whose vertex is di- 

 rected forwards, being of a yellowish-white colour. The falces, 

 maxilke, and lip have a pale brownish -yellow hue, the base of 

 the lip and maxilla?, the extremity of the falces, and the sternum 

 being of a dark-brown colour. The femora, genua, and tibiae 

 of the anterior legs have a black hue, and that of the slender 

 metatarsi and tarsi is brownish yellow ; the colour of the second, 

 third, and fourth pairs of legs is brownish black, with a few pale 

 brownish-yellow annuli. The palpi are of a pale brownish-yellow 

 colour, the extremity of the humeral joint, the cubital and radial 

 joints, and the extremity of the digital joint having a brownish- 

 black tint. The abdomen is soot-coloured, mingled with white, 

 the sides being the darkest and the under part the lightest- 



