110 Mr. J. BlaekwalPs Characters of some 



white. The superior spinning mammulae, which are much 

 longer than the rest, very prominent, and triarticulate, have 

 the papillae, or delicate tubes from which the silk issues in the 

 act of spinning, disposed along the under side of the terminal 

 joint; their colour, and that of the intermediate pair, is red- 

 brown, the inferior pair being black. 



Length, from the anterior part of the cephalothorax to the 

 extremity of the abdomen, not including the spinners, f^ths 

 of an inch; length of the cephalothorax J; breadth y 1 ^; 

 breadth of the abdomen y 1 ^ ; length of a posterior leg fa ; 

 length of a leg of the first, second, and third pairs j^ ; length 

 of a superior spinning mammula fa. 



The male is smaller and darker coloured than the female, 

 but the relative length of its legs is the same; their absolute 

 length, however, is greater, a posterior leg measuring Jths of 

 an inch. The third and fourth joints of the palpi are short, 

 the latter projecting a strong acute apophysis from the outer 

 side of its anterior extremity ; the fifth joint is of an oblong 

 oval figure pointed before ; it is convex and hairy externally, 

 concave within, comprising the sexual organs, which are highly 

 developed, complex, with prominent, curved spiny processes, 

 and are of a brownish-black colour tinged with red. 



In the summer of 1830, I found this active spider on rocks 

 and stone-walls in the pass of Llanberis, Caernarvonshire; 

 and I have since met with it in abundance at Oakland, in 

 Denbighshire, and in other parts of North Wales. The Tex- 

 trices are nearly allied to the Aranece of M. Latreille, which 

 comprise the Tegenarice and Agelence of M. Walckenaer, and 

 the Arachnes of M. Savigny. By the disposition of the eyes 

 they also appear to connect the Tubitelce with the Citigrad<z 

 through the medium of the genus Dolomedes. 



Tribe, Inequitelte, Latreille. 



Genus, Manduculns. 



Eyes eight in number, unequal in size, arranged in two 

 transverse rows on the anterior part of the cephalothorax ; the 

 four intermediate ones, which are the largest, form a square, 

 and the other four are disposed obliquely in pairs on the sides 

 of the square, the eyes constituting each being placed on a 

 small eminence, and nearly contiguous. 



Maxillae long, inclined towards the lip, enlarged at the base 

 where the palpi are inserted, and slightly so at the apices, 

 which converge abruptly and are contiguous. 



Lip large, triangular, truncated at the vertex. 



Legs long and slender ; the first pair is the longest, then 

 the second, the third pair being considerably the shortest. 



