S38 Mr. J. Blackwall on some new species 



than the third and fourth pah-s, are nearly equal in length, the 

 first pair being rather the longer, and are provided on the under 

 side of the tibise and metatarsi with two parallel rows of strong 

 spines ; the legs of the third pair are the shortest : the palpi are 

 short, and have a curved pectinated claw at their extremity. 

 These parts, which are of a pale green colour in immature 

 females, are greenish yellow in adults. The tarsi are terminated 

 by two curved deeply pectinated claws. Abdomen oviform, 

 sparingly supplied with hairs, convex above, projecting over the 

 base of the cephalo-thorax ; the upper part is of a bright red 

 colour, paler in the medial region, and has a few obscure trans- 

 verse lines of a lighter hue above the spinners ; the sides are 

 yellowish white, and the under part is pale red mottled with 

 yellowish white spots. Sexual organs brownish black. 



The male, though rather smaller and slenderer than the 

 female, resembles her in colour, with the exception of the 

 cephalo-thorax and its appendages which are red ; the legs also 

 have the same relative length, but their absolute length is 

 greater, an anterior one measuring f fths of an inch. The 

 radial joint of the palpi, which is rather stronger than the cubital, 

 projects a large pointed apophysis from its extremity, on the 

 outer side ; the digital joint is oval, pointed at its termination, 

 convex and hairy externally, concave within, comprising the 

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

 plicated in structure, and are of a red colour. The concavity 

 of the digital joint does not extend to its extremity, which is 

 compact. 



An adult male and female of this handsome species, captured 

 at Southgate in 1848, the former in May and the latter in June, 

 are in Mr. Walker's cabinet. 



Genus Philodromus, Walck. 



3. Philodromus Clarkii. 



Length of the male |th of an inch ; length of the cephalo- 

 thorax y^^ ; breadth ^^ ; breadth of the abdomen y'^ ; length of 

 a leg of the second pair f ; length of a leg of the fourth pair |. 



Cephalo-thorax nearly circular, slightly compressed before, 

 convex, with a small indentation in the medial line of the posterior 

 region : falces small, conical, vertical : maxillae gibbous near the 

 base, inclined towards the lip, and convergent at the extremities : 

 lip triangular : sternum heart-shaped : legs long and slender, 

 provided with hairs and spines ; the second pair is the longest, 

 then the first, and the fourth pair is the shortest. These parts 

 are of a red-brown colour freckled with minute spots of a deeper 

 hue. Each tarsus is terminated by two curved pectinated claws. 



