Mr. Blackwall's Descriptions of new Species of Spiders. 625 



the smallest of the eight. Mandibles strong, conical, vertical, armed with 

 a few teeth on the inner surface. Maxillœ short, convex at the base, round 

 at the extremity, and inclined towards the lip, which is nearly quadrate, 

 being rather broader at the base than the extremity. These organs are 

 brown, with a tinge of red, the base of the lip being much the darkest. 

 Sternum short, heart-shaped, and of a yellowish brown colour. Legs and 

 palpi brown, tinged with red ; the thighs are the palest. Fourth pair of 

 legs the longest, then the first, third pair the shortest ; the tibiae and 

 metatarsal joints of the first and second pairs have a series of large, ses- 

 sile spines on each side of the inferior part. Tarsi terminated by two 

 curved, pectinated claws. The palpi have a small, curved claw at their 

 extremity. Abdomen oviform, rather broader at the posterior than the 

 anterior extremity, hairy, convex above, projecting over the base of the 

 cephalo-thorax ; the upper part is very dark brown, witii reddish brown 

 and scattered hairs of a yellowish brown colour intermixed ; along the 

 middle extends an obscure, dentated band of reddish brown ; the under 

 part is yellowish brown, witii three faint, longitudinal lines of a darker 

 hue. The superior spinners are short, and have the spinning-tubes dis- 

 posed at their extremity. Plates of the spiracles pale yellow. 



The male is smaller than the female, which it resembles in colour and 

 in the relative length of its legs. Third and fourth joints of the palpi 

 short, the latter having a straight, pointed apophysis at its extremity, on 

 the outer side ; fifth joint oval, convex and hairy externally, concave 

 within, comprising the palpal organs : they are highly developed, rather 

 complicated in structure, vascular, with a black, corneous process at the 

 extremity, which is broad, depressed, and curved near the base, and 

 abruptly recurved about the middle ; their colour is red-brown. 



Agelena celuns frequents woods in the vicinity of Llanrwst, running nimbly 

 upon the ground and concealing itself under stones. T'he male has the palpal 

 organs fully developed in August. It is a scarce species. 



