3Ir. Blackwall's Descriptions nf new Species of Spiders. 643 



joints of the palpi short ; the foriuer 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 tiie 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 reddish 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. Neriëne errans. Cephalo-thorace appendicibusque brunneis, nisi in pe- 

 dibus palpisque pallidè rufo-bruniieis ; abdomine obscure viridescenti- 

 brunneo série medianâ obscurâ linearum angularium flavescenti-brun- 

 neâ. 



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

 ■^; breadth of abdomen t^^ ; length of an anterior leg ^ ; length of a 

 leg of the third j)air y. 



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 incUned towards the sternum, which is 

 heart-shaped. Maxillee 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, maxillte 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 fointly tinged with green, and has a series of obscure, 

 angular lines, of a pale yellowisii 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 V 



