Mr. BuackwaLL's Descriptions of new Species of Spiders. 641 
highly developed, complicated in structure, with a curved, pointed, cor- 
neous spine at the extremity, and are of a reddish-brown colour, Abdo- 
men oviform, convex above, projecting over the base of the cephalo-tho- 
rax; it is thinly clad with hairs, wt and brownish black. Plates of 
the spiracles brown. 
A specimen of this species, captured in the neighbourhood of Manchester, 
was received from T. Glover, Esq., in June 1838; and in the following month 
another specimen was taken near Llanrwst. Both individuals were adult 
males. - 
27. Walckenaéra nemoralis. Maris cephalo-thorace mandibulis maxillis labio 
sterno pedibus palpisque brunneis; abdomine nigricante; cephalo-tho- 
race anticé elevato obtuso transverse? bipartito; pedum pari 4to Imo 
longiore. 
Length of the male th of an inch; length of cephalo-thorax yy; breadth 
gs; breadth of abdomen yy; length of a posterior leg yy; length ofa 
leg of the third pair n. 
There is no indentation in the medial line of the posterior region of the cephalo- 
thorax; the anterior part is elevated, but obtuse, with a transverse groove 
in front, which divides it into two segments. One pair of eyes is situated 
on the upper segment, near its anterior margin, and the rest are seated on 
the lower segment, one pair being placed on each side, and the other in 
front; the eyes of the last pair are the smallest of the eight, and, with 
those on the upper segment, form a long trapezoid, whose shortest side 
is before. Mandibles conical, armed with teeth on the inner surface, and 
inclined towards the sternum, which is broad, convex and heart-shaped. 
These parts, with the maxillæ, lip, legs, and palpi, are brown, the legs 
being the palest, and the lip, anterior part of the cephalo-thorax, and ter- 
minal joint of the palpi the darkest. Fourth pair of legs the longest, then 
the first, third pair the shortest. The fourth joint of the palpi, which is 
~~ shorter than the third, projects three’ apophyses from its extremity; the 
smallest is situated underneath, the largest in front, and the third, of 
intermediate size, on the outer side; fifth joint oval, convex and hairy 
externally, concave within, compages. the palpal organs, which are highly 
