503 



round, and slightly elevated, with a longish, narrow, longitudinal 

 indentation running backwards from each hind-lateral eye; 

 the height of the clypeus exceeds half that of the facial space. 



Eyes very similarly placed to those of Walckenaera pratensis, 

 Blackw. 



Legs moderately long, 4.1.2.3., strong, bright orange-yellow. 



Palpi rather short ; cubital joint rather longest at its fore- 

 extremity, which is a little produced in front ; radial joint very 

 short, but strong, and expands on all sides, mostly in front and 

 rather on the outer side, where there is a tuft of bristly hairs ; 

 digital joint short ; palpal organs prominent, but not very com- 

 plex, with a strong, black, circularly-curved spine at their outer 

 extremity, and from within its curvature, a strongish, yellow- 

 red-brown, black tipped, sharp, corneous process projects down- 

 wards. 



Abdomen glossy black, rather large, of a flattened-convex 

 form on the upper side, the centre of which is occupied by four 

 round, impressed, red-brown spots, in a square, whose fore-side 

 is the shortest. 



Closely allied to Walckenaera pratensis, Blackw., but among 

 other slight differences the eyes of the hind-central pair are 

 nearer together, forming a line scarcely longer than that 

 described by the fore-central pair, and the clypeus is proportion- 

 ately higher. 



Found in "Wicken Fen, Cambridgeshire. 



WALCKENAERA INCURVATA. 



Walokenaeea inctovata, Cambr., Trans. .Linn. Soc. xxviii., p. 

 551, pi. xlvi., fig. 20. 



Length of the male scarcely 4-5ths of a line. 



Cephalo-thorax short, broad, greenish yellow-brown, with 

 darker, dusky, converging lines on the sides ; the upper part of 

 the caput is very slightly raised ; occiput full and rounded. 



