ON NEW AND RARE BRITISH ARACHNIDA. 139 



organs distinguish it without difficulty. In the only example I 

 have seen the legs were much mutilated, so that no details of 

 them could be ascertained. 



A single adult male received from Norwich. 



Leptyphantes patens, sp. n. PI. A., Figs. 20-25. 



Adult male, length i lines ; female the same. 



Cephalothorax (male), looked at from above and very nearly 

 vertically, longer than wide, bluff and rounded before, and 

 rounded behind ; lateral marginal indentations at caput very 

 shallow. Profile with a slight impression before the central 

 longitudinal indentation ; height of the clypeus greater than 

 half that of the facial space ; colour pale yellow. 



Eyes on black spots, in two transverse rows rather near to 

 each other. The posterior row is longest and curved, but not 

 strongly, the convexity of its curve directed backwards. The 

 intervals between the eyes of this row are very nearly equal and 

 about equal to their width ; if anything, that between the 

 central pair is slightly the greatest. The anterior row is 

 straight; those of its central pair are much the smallest, and 

 each is about a diameter's distance from both the lateral and 

 hind-central eyes on its side, and there is about half a diameter's 

 interval between themselves. All the eyes are pearly white, 

 excepting the fore-centrals, which are dark grey. 



Legs tolerably Jong, not very unequal, apparently 4, i, 2, 3, 

 slender ; colour pale yellow ; normal spines, slender. 



Fakes similar in colour to the legs, moderate in length and 

 strength, slightly divergent, with three nearly equal teeth in an 

 oblique row on the upper margin of the fore extremity and a 

 straight longitudinal row of exceedingly minute denticles near 

 their outer side, scarcely discernible without microscopic power. 



Palpi rather short, like the legs in colour ; cubital and radial 

 joints short, about equal in length. The former has a longish 

 curved tapering spiniform bristle at its fore extremity towards 

 the outer side ; the latter is broadish in front with a transverse 



