Mr. Blackwall's Descriptions of new Species of Spiders. 643 



joints of the palpi short ; the former is very strong and convex in front, 

 and the latter projects three apophyses from its extremity ; the largest is 

 situated on the outer side, the next in size on the inner side, and the small- 

 est underneath ; fifth joint oval, convex and hairy externally, concave 

 within, comprising the palpal organs, which are highly developed, com- 

 plicated in structure, and of a I'eddish brown colour. Abdomen oviform, 

 convex above, projecting over the base of the cephalo-thorax ; it is thinly 

 covered with hairs, glossy and brownish black. Plates of the spiracles 

 yellowish white. 



Males of this species, with the palpi fully developed, may be seen in May 

 and June among grass and plants growing in the woods about Llanrwst. 



29. Neriene errans. Cephalo-thorace appendicibusque brunneis, nisi in pe- 

 dibus palpisque pallid^ rufo-brunneis ; abdomine obscur^ viridescenti- 

 brunneo serie mediana obscuri linearum angularium flavescenti-brun- 

 nea. 



Length of the female ^th of an inch ; length of cephalo-thorax -^ ; breadth 

 ■^ ; breadth of abdomen -^ ; length of an anterior leg -^ '■> length of a 

 leg of the third pair \. 



Cephalo-thorax oval, convex above, glossy, with an indentation in the medial 

 line of the posterior region. Mandibles powerful, conical, armed with 

 teeth on the inner surface, and inclined towards the sternum, which is 

 heart-shaped. Maxillae strong, and inclined towards the lip, which is 

 semicircular and prominent at the extremity. These parts are brown, 

 the sternum being the palest, and the mandibles, maxillae and lip having 

 a tinge of red. Eyes small. Legs and palpi pale red-brown. First and 

 fourth pairs of legs, which are the longest, equal in length, third pair the 

 shortest. Abdomen oviform, rather convex above, projecting over the 

 base of the cephalo-thorax ; it is thinly covered with hairs, glossy, of a 

 brownish colour faintly tinged with green, and has a series of obscure, 

 angular lines, of a pale yellowish brown hue, whose vertices are directed 

 forwards, extending along the middle of the upper part. Sexual organs 

 dark red-brown. Plates of the spiracles dull yellowish brown. 



The male resembles the female in colour and in the relative length of 

 VOL. xviii. 4 p 



