tieu- CI e ncra aud Sj^ecics of British Sjyidcrs. 80 



majority of those doscrilxHl under tlicsc two i^cncra, though in 

 some ros])ects it resembles T. simplex, F. Cb. 



The specimen ht-re described, an adult male, was taken 

 near Carlisle in 1892. 



IIiLi.liousiA, G^en. nov. 



Cephahthorox deeply excavated at base, oval-elono;ate ; 

 caput (female) raised, depressed in front, convex, furnished 

 w ith some short curving hairs. 



Eyes of posterior row situated in a straight line, equal, 

 almost ecjuiilistant, one diameter apart. Anterior rowciU'viMl, 

 convexity backwards; centrals slightly smaller, almost one 

 diameter apart, one diameter from laterals. 



Cli/peus as high as the ocular area, convex, projecting for- 

 wards. 



Falces two and a half times the height of the elypeus, 

 convex at base, attenuate and divergent at apex, furnished 

 with four sharp teeth on the upper margin of the fang- 

 groove. 



Sternum as long as broad, tlattened-convcx, set with short 

 black hairs. 



Lecjs clothed with short hairs, devoid of spines, but tibi;e 

 of all four pairs with two erect bristles above. Femora fur- 

 nished with a double row of long hairs beneath. 



Abdomen thickly clotlied with short hairs, exhibiting be- 

 neath, just behind the spinners, a transverse slit, the entrance 

 to S])iraeular breathing-organs. 



The spiders for whose reception this genus is founded are 

 very closely allied to Tmcticus and Porrhomma. The exca- 

 vation at the base of the cephalothorax, however, seems to 

 sufficiently separate them from both these genera. 



In all probability as time goes on and more examples turn 

 up it will be necessary to form more genera for the reception 

 of species now associated together under the same generic 

 titles, especially in the ease of the numerous puzzling species 

 of the group Linyphini, to which these spiders belong. 



Hillhousia desolans, sp. n. (PI. I. fig. 4.) 



Length of female 1^ line. 



Ceplialotliorax and caput dull orange-yellow, striaj and 

 margin dusky brown. 



Falces yellow, fangs tinted with pink. 



Sternum deep brown. Abdomen olive-green or dull black ; 

 legs pale yellow. 



