644 Mr. BIAckwall's Descriptions of new Species of Spiders. 
his legs, but is rather smaller than she is. Third and fourth joints of the 
palpi short, the latter being much the stronger; fifth joint somewhat oval, 
with a large lobe on the outer side, near the upper part; it is convex and 
hairy externally, concave within, comprising the palpal organs, which are 
highly developed, complicated in structure, with several curved, pointed, 
prominent, corneous processes at the extremity, and of a. red-brown co- 
lour. * : 
Neriéne errans is of frequent occurrence on rails in the vicinity of Man- 
chester, and of Llanrwst. 
30. Neriéne sylvatica. Mas brunneus ; abdomine nigricante. 
Length of the male 3th of an inch; length of cephalo-thorax zs; breadth M; 
breadth of abdomen ; length of an anterior leg +; length of a leg of 
the third pair 4. | 
Anterior part of the cephalo-thorax, where the eyes are situated, rather pro- 
minent; sides marked with furrows diverging from the upper part to the 
margins; in the medial line of the posterior region there is a large indenta- 
tion. Mandibles conical, provided with a few teeth on the inner surface, 
and a longitudinal row of exceedingly short, fine spines in front, on the 
outer side; they are inclined towards the sternum, which is broad and 
heart-shaped. Maxillæ very gibbous near the base, and inclined towards 
the lip, which is semicircular and prominent at the extremity. Legs slen- 
der. These parts are brown; the legs, which are the palest, and the man- 
dibles, maxillæ and lip, which are the darkest; having a tinge of red. 
First and fourth pairs of legs the longest and equal in length, third pair 
the shortest. Eyes seated on black spots. "The palpi resemble the legs 
in colour; the third and fourth joints are short, the former projecting a 
long bristle from its extremity, in front, and the latter, which is the 
stronger, being gibbous underneath, at the base; fifth joint somewhat 
oval, with a bold, conical protuberance at the upper part, in front, and a 
prominent lobe on the outer side; it is convex and hairy externally, con- 
cave within, comprising the palpal organs, which are highly developed, 
complicated in structure, with a strong, curved, obtuse, corneous process, 
slightly serrated on its external edge, situated on the outer side of the 
