Mr. J. Blackwall on new species of Madeiran Spiders. 265 



base curved outwards; it is convex and hairy externally, con- 

 cave within, comprising the palpal organs, which are very highly 

 developed, very prominent, with a strong, curved, black spine, 

 connected with a membrane, near the middle, whose prominent 

 point is directed outwards : the colour of these organs is red- 

 brown. The digital joints have their convex sides directed 

 towards each other. 



The spider described above was captured among plants in a 

 garden at an elevation of 200 feet above the level of the sea. 



Tribe Senoculina. 



Family DysueridtE. 



Genus Oonops, Templeton. 



Oonops concolor. 



Length of the female y^g th of an inch ; length of the cephalo- 

 thorax ^-^ ; breadth ^\j ; breadth of the abdomen -^^ ; length of 

 a posterior leg —^ ; length of a leg of the third pair ■^^. 



The eyes are oval, and are closely grouped in pairs on a black 

 spot at the anterior part of the cephalothorax : two pairs are 

 placed laterally, the anterior eye of each being the largest and 

 the posterior one much the smallest of the six; and the third pair is 

 intermediate, the eyes which constitute it being in contact. The 

 cephalothorax is oval, convex, glossy, and without an indenta- 

 tion in the medial line. The falces are short, conical, and ver- 

 tical. The maxillae are convex near the base, obliquely trun- 

 cated at the extremity, on the outer side, and inclined towards 

 the lip, which is triangular. The sternum is heart-shaped and 

 glossy, with slight eminences on the sides, opposite to the legs. 

 The legs and palpi are moderately robust, and are provided 

 with hairs ; the fourth pair of legs is the longest, then the first, 

 and the third pair is the shortest ; each tarsus is terminated by 

 two curved, pectinated claws. The abdomen is oviform, de- 

 pressed, glossy, thinly clothed with short hairs, and projects a 

 little over the base of the cephalothorax. This spider is entirely 

 of a reddish-brown colour, the legs, palpi, and spinners, which 

 are prominent, being the palest. 



The sexes resemble each other in colour; but the male is 

 rather the smaller, and its palpi are very remarkable in struc- 

 ture. Unfortunately the palpi of the only male in the collection 

 were too much injured to be described with exactness ; the hu- 

 meral joint appeared to be small, somewhat conical, and arti- 

 culated by its apex to the cubital joint, which was large, very 

 tumid, and convex at the base, and the radial and digital joints 

 were small. 



