620 
Mr. BzackwaLv's Descriptions of new Species of Spiders. 
eyes of the anterior row are the largest of the eight. Abdomen short, 
broad, thickly covered with hairs, somewhat larger at the posterior than 
the anterior extremity, convex above, projecting over the base of the 
cephalo-thorax ; it is of a very dark brown colour, approaching to black, 
the under part being the palest; along the middle of the upper part 
extends a series of very obscure, angular lines of a lighter hue, whose 
vertices are directed forwards; and on each side of the anterior part, 
near its union with the cephalo-thorax, there is a blackish spot of an 
oval form. Spinners yellowish red, arranged in a transverse row imme- 
diately below the anus; the exterior ones, which are the longest, are | 
triarticulate, and have the papillæ or spinning-tubes disposed along the 
inferior surface of the terminal joint. Plates of the spiracles yellowish 
white. 
The male is rather smaller than the female, which it resembles in 
colour, and in the relative length of its legs; the absolute length of the 
organs of progression, however, is greater, a posterior leg measuring 
teths of an inch. The second joint of the palpi has a curved, pointed, 
yellowish red process on the under side, near the middle; third and 
fourth joints short; the former is much the larger, very gibbous above, 
and has a small, pointed, blackish apophysis near its extremity on the 
outer side; the latter has a strong, blackish apophysis at its extremity on 
the under side, which is directed upwards, its curved point being in con- 
tact with the small apophysis of the tbird joint; fifth joint oval, mode- 
rately convex and hairy externally, concave within, comprising the palpal — 
organs; they are highly developed, not very complicated in structure, 
vascular, surrounded by a filiform, black spine, and are flesh-coloured. 
The convex sides of the terminal joints of the palpi are directed from, 
and the palpal organs towards each other. 
: This species, which resembles Teætria agilis in the relative length of its 
egs; 
The males have the palpal o 
August. 
is found under stones in moist pastures near Llanrwst in Denbighshire. 
rgans completely developed in the month of 
