G22 Mr. Blackwall's Descriptions of new Species of Spiders. 



inulae, being of a brown colour. Scximl organs dark red-brown. Plates 

 of the spiracles whitish. 



The male is rather smaller than tlie female, which it resembles in colour. 

 In both sexes the relative lengtli of the legs is the same, but their abso- 

 lute length is greater in the male, a posterior one measuring ^th of an 

 inch. Third and fourth joints of the palpi short : tiiere is a slender, 

 curved process on the outer side of the upper part of the former ; another, 

 longer, slenderer at its extremity, and more curved, projecting from a 

 prominence or apophysis at the outer side of the lower extremity of the 

 latter ; fifth joint oval, convex and hairy externally, concave within, com- 

 prising the palpal organs, which are moderately developed, not very com- 

 plicated in structure, prominent at the upper part, nearly encircled by a 

 fine, black spine, and are of a pale red-brown colour. 



Agelena promptu occurs under stones in the woods near Llanrvvst in Den- 

 bighshire. The male has the palpal organs fully developed in October. 



10. Agelenu montana. Cephalo-thorace mandibulis maxillis labio sterno pedi- 

 bus palpisque brunneis ; abdomine nigricante, obscure sed ad latera evi- 

 dentiiis flavescenti-brunneo maculato. 



Length of the female, not including the spinners, x^ih of an incli ; length of 

 cephalo-thorax oV ; breadth ^; breadth of abdomen -^; length of a 

 posterior leg ^; length of a leg of the third pair ^j. 



Anterior i)art of the cephalo-thorax slightly compressed ; sides depressed, 

 marked with furrows diverging from the upper part to tiie margins ; in 

 the medial line of tiie posterior region there is a narrow indentation. 

 Mandibles strong, conical, and inclined towards the sternum, which is 

 heart-shaped. Maxilloe short, gibbous at the base, round at the extre- 

 mity, and inclined towards the lip, which is nearly semicircular. These 

 parts are brown, the lip being much the darkest. Legs and palpi brown, 

 the joints being the palest. Posterior pair of legs the longest, then the 

 first, which a little exceeds the second in length, third pair the shortest. 

 Tarsi terminated by three claws; the two superior ones are curved and 

 pectinated, and the inferior one is inflected near its base. The palpi have 



