A NEW GENUS AND SPECIES OF SPIDER 

 {EBORIA CALIGINOSA). 



WM. FALCONER. 



Slaithwaite, Huddersfiehl. 



(plate I.). 



Amongst a numbei' of spiders collected in May iqoq, on a high 

 moor in the neighI:)Ourhood of Marsden. in the Colne Valley, 

 S.W. Yorks., were a male and female which were unknown to 

 me. Subsequent examinations and careful comparison with 

 other species led me to the conclusion that they were not only 

 new to science, but also possessed characters, which would 

 }n"event their inclusion in an}'^ of the known genera of the 

 Erigoneae, the group of the sub-family Linyphiinac to which 

 they belong. They were submitted to the Rev. O. Pickard- 

 Cambridge, and Dr. A. Randell Jackson, and these authorities 

 concurred in the \-iew taken of them. I ha\'e. therefore, in 

 the following pages, described and tigured them as the two 

 sexes of a new species in a new genus. 



Fam. Argiopid/E. 



Sub-Fam. Likyphiin^. 



Group Erigoxeae. 



Gen. Nov. EBORIA. 



Cephalothorax \er\' little longer than wide, and oval in 

 shape, very broadly so in the male, but narrower in proportion 

 in the female ; well rounded at the sides behind and squarely 

 truncate at the posterior margin ; a little attenuated forward, 

 and very obtusel}' truncate in front ; thoracic sutures distinct. 

 Male without cephalic lobe, postocular impressions or central 

 longitudinal strie. In both sexes there is a slight dip above, 

 and a slight constriction at the sides, between the caput and 

 thorax ; and a shallow depression (indistinct in $, distinct in ,^) 

 separates the posterior centrals from the rest of the eyes. 



Caput and Thorax both somewhat convex ; the latter in 

 the male considerably more elevated than the former ; much 

 more nearly equal, howe\-er, in the female. 



Clypeus equal in height to the ocular area, impressed below 

 the eyes, and the lower margin slightly ad\-anced. 



Ocular area occupying the whole of the wide front. 



1910 Feb. I. 



