90 ON NEW AND RARE BRITISH ARACHNIDS. 



&c., the projecting process at the extremity of the palpal 

 organs distinguishes it readily. It was found by the Rev. 

 R. J. Pickard-Cambridge on iron railings at Warm well 

 Rectory at the middle of June, 1911. 



Leptyphantes nigrescens, sp.n. 



Adult male length 1 2-3 line (of another example 1 1-8). 



Cephalothorax of ordinary form, longer than broad ; caput 

 broadly truncate at the fore extremity ; lateral constriction 

 at the thoracic junction slight ; looked at in profile, the 

 upper marginal line throughout is on the same level and 

 slightly curved, the hinder slope not steep, and slightly 

 curved ; only a small impression at the thoracic junction ; 

 the height of the clypeus is about equa 1 to half that of the 

 facial space, and the former is much impressed below the 

 anterior eyes and prominent at the fore margin. Colour 

 yellow-brown, the caput, normal indentations, and grooves, 

 black brown. 



Eyes of moderate and not greatly different size ; the 

 fore-central and two lateral pairs are seated on strong tuber- 

 cular prominences ; the three groups forming a transverse 

 figure and occupying the whole width of the caput ; the 

 four centrals form a quadrangle rather longer than broad, the 

 anterior side shortest. The posterior row is not quite straight, 

 the convexity of its curve being slight and directed forwards ; 

 its two central eyes are nearer together than each is to the 

 lateral on its side. 



Legs long, rather slender, 1, 2, 4, 3, of a dull pale yellow- 

 brown colour, the anterior joints slightly suffused with a 

 darker hue. There are several spines on the tibiae of the two 

 fore pairs, and two or three on the metatarsi, one on the 

 outer, another on the inner side, and one nearer the 

 extremity. This last armature seems abnormal for 

 Leptyphantes, the ordinary number on the metatarsi being 

 one only. 



