NEW AND RARE BRITISH SPIDERS. 35 



Abdomen oval, moderately convex above, clothed pretty thickly 

 with short coarse hairs ; colour black. Genital aperture of 

 distinctively characteristic form. Though somewhat resembling 

 its congener G. dentatum, Wid., in general appearance, this spider 

 may be easily distinguished by the form of this aperture, by its 

 rather larger size and the eminence at the occiput ; in G. dentatum 

 the occiput is only a little and roundly convex. Spinners short 

 and inconspicuous, immediately in front of them is a rather 

 conspicuous transverse curved slit or opening, no doubt the 

 entrance to a spiracular organ. 



An adult female received from Mr. W. Evans, by whom it was 

 found at Comrie, Scotland, in April, 1900, 



Gen. nov. * SUSARION. 



Cephalothorax short, broad-oval, roundly truncated before ; 

 lateral marginal impressions at the caput distinct, but slight. 

 Upper part of caput a very little raised above the thoracic level. 

 Height of clypeus less than half that of the facial space. 

 Clypeus well rounded and rather prominent towards its lower 

 margin. 



Eyes in two transverse rows, rather large sub-equal, fore- 

 centrals smallest, the anterior row rather the shortest ; both 

 rows are curved, the posterior curve strongest and its convexity 

 directed backwards, that of the anterior row forwards. All are 

 of a pearly white colour ; those of the anterior row are very near 

 together, the intervals equal and less than the diameter of a 

 fore-central eye ; those of each lateral pair are placed slightly 

 obliquely, and are separated by an interval equal to that between 

 the fore-centrals, so that these six eyes form an equally divided 

 semi-circle ; those of the hinder row are equally separated by 

 rather less than a central eye's diameter's interval, the four 

 centrals form a trapezoid whose fore side is shortest and its 

 length considerably greater than its breadth. 



* Nom. propr. 



