Mr. J. Blackwall on new species of Madeiran Spiders. 261 



the cephalothorax. The eyes, which are seated on black spots, 

 are disposed in two transverse, nearly straight rows on the an- 

 terior part of the cephalothorax; the four intermediate ones 

 form a square, the two anterior ones, which are placed on a 

 tubei-cle, being the smallest and darkest of the eight ; the eyes 

 of each lateral pair are placed obliquely on a tubercle, and are 

 near to each other. The abdomen is oviform, thinly clothed with 

 hairs, convex above, and projects over the base of the cephalo- 

 thorax ; it is of a dull black hue, the under part being tinged 

 with brown, and has a curved band at the anterior extremity of 

 the upper part, a row of four spots in the medial line, which 

 diminish in size as they approach the spinners, the first having 

 a semicircular form, two spots opposite each extremity of the 

 curved band, and four others on each side, the two intermediate 

 ones being oblong, oblique, and nearly in contact ; these spots 

 and the curved band have a yellowish-white colour ; a whitish 

 line extends along each side of the under part to the spinners, 

 which lines, with the coccyx, have a pale yellow-brown hue, that 

 of the branchial opercula being yellowish white. 



This Latrodectus, which, by the disposition of its eyes and 

 the structure of its oral apparatus, makes a near approach to the 

 Theridia, was captured among herbage growing on the Fossil- 

 bed, at an elevation of 200 feet above the level of the sea. 



Family Linyphiid;e. 



Genus Linypho, Latr. 



Linyphia Johnsoni. 



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

 thorax T ^ ; breadth j 1 ^ ; breadth of the abdomen T ^ ; length of 

 an anterior leg T 7 g ; length of a leg of the third pair \. 



The eyes, which are unequal in size, are seated on black spots 

 on the anterior part of the cephalothorax ; the four intermediate 

 ones form a trapezoid whose anterior side is much the shortest, 

 and those of each lateral pair are placed obliquely on a small 

 tubercle, and are contiguous ; the posterior eyes of the trapezoid, 

 which are seated on a tubercle, are much the largest, and the 

 anterior ones rather the smallest of the eight. The cephalo- 

 thorax is oval, convex, glossy, with an indentation in the medial 

 line ; it is of a dull yellowish-brown colour, with a broad, longi- 

 tudinal, black band in the middle, and another of the same hue 

 extending along each lateral margin. The falces are long, 

 powerful, conical, vertical, armed with teeth on the inner sur- 

 face, and of a yellowish-brown colour faintly tinged with red at 

 the extremities, which are rather divergent. The maxillae are 



