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



dibulis maxillis labioque saturate bi'unneis ; palpis pedibusque rufis, 

 horum pari Imo 4toque longissimis sequalibus, 3tio brevissimo; abdo- 

 mine nitente nigro. 



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, prominent before, where the eyes 

 are seated, with an indentation in the medial line of the posterior region ; 

 numerous strongly marked punctures occur on the margins, from which 

 rows of punctures converge to the upper part. Mandibles conical, armed 

 with a few teeth on the inner surface, and inclined towards the sternum, 

 which is broad, heart-shaped, and thickly marked with punctures. Max- 

 illae inclined towards the lip, which is semicircular and prominent at the 

 extremity. These parts are very dark brown, the mandibles and maxillae 

 having a tinge of red. Legs and palpi red. The first and fourth pairs of 

 legs, which are the longest, are equal in length, and the third pair is the 

 shortest. Tarsi terminated by three claws ; the two superior ones are 

 curved and pectinated, and the inferior one is inflected near its base. 

 Eyes of the lateral pairs the largest, and those of the intermediate pair of 

 the anterior row much the smallest of the eight. Abdomen oviform, 

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

 covered with hairs, glossy, and black. Sexual organs rather prominent, 

 and reddish brown. Plates of the spiracles dull yellow. 



Females of this species were taken in May 1838, under stones in a moist 

 pasture near Llanrwst. 



17. PTulckenaSra turgida. Cephalo-thorace mandibulis maxillis labio sterno- 

 que saturate pedibus palpisque rufescenti-brunneis ; abdomine brunneo 

 saturatiiis marmorato. 



In anteriori cephalo-thoracis parte maris protuberantia magna oculi- 

 fera lateribus fortit^r dentatis ; et ante utrumque oculum paris superioris 

 protuberantia magna obtusa. 



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



