ON NEW AND RARE BRITtSH SPIDERS. 165 



The genital process is of a very distinct and characteristic form. 

 Adults of both sexes were sent to me in 1902 from Hexham, by 

 Dr. A. R. Jackson. 



Gongfylidiellum paganum, Sim. Fig. 7. 



Gongylidiellum pagcmiun, Sim. Arachn de France, V., p. 602. 



Adult male, length grds of a line (or i-iSth of an inch). 



Very nearly allied to GongylidieUum vivum, Cambr., which it 

 resembles in size, colouring, and general appearance ; but it may 

 at once be distinguished by the form of the radial joint of the 

 palpus. This portion of structure in G. paganum has its forepart 

 on the upper side produced into very large and broad apophysis 

 whose obtusely pointed extremity is abruptly crooked and its 

 point directed outwards. 



This very distinct and striking species was sent to me by Mr. 

 W. Falconer, by whom it was taken near Huddersfield the early 

 part of 1903. This is its first record as a British Spider. 



Diplocephalus adjacens, sp.n. Fig. 8. 



Adult male, length i line. Adult female, slightly longer. 



Colour black, the whole of the fore part, more or less, deep 

 brown or yellow-brown. 



This spider belongs to a small group to which the common 

 Diplocephalus cristaius, Bl., comes nearest. In this species 

 ( D. cristaius) the fore part of the caput on the upper side is 

 divided in the male into two short, fore and aft, lobes, somewhat 

 divergent, with a deep groove or hiatus between them. In the 

 various described species of the group now under consideration 

 these two lobes are of different height, strength, proportion, and 

 direction, some more, some less, approaching each other at their 

 extremities. The spider now recorded hardly coincides exactly 

 with either of the known forms, but appears to partake of a 

 rather mixed character. The anterior lobe is the shortest, 

 straight, a little tapering or sub-conical, the posterior lobe is 



