420 



The relative length of the legs is 4.1.2.3, but the difference 

 between those of the first and fourth pairs is slight. 



The palpi, falces, and maxilloe are similar in colour to the 

 legs ; while the colour of the sternum is liko that of the cephalo- 

 thorax. 



The eyes are very similar in general size and position to those 

 of Gnaphosa anglica, but are more closely grouped together, and 

 form a more rectangular area, whose transverse diameter is also 

 shorter in proportion to the longitudinal. 



The abdomen is rather broad, and of an oblong-oval form, 

 truncate before ; it is of a dull brown colour, tho slightly red- 

 dish-yellow adpressed pubescence being mixed with longer, 

 stronger, prominent, black, bristly hairs. 



The example above described was found under a stone near 

 Sherborne, in the spring of 1878, by my nephew, Frederick 

 Octavius Pickard-Cambridge. Although owing to its not being 

 adult, its best specific characters are not developed, I have 

 ventured to describe it as a new species. It is, at any rate, 

 distinct from Gnaphosa anglica and Gnaphosa lugubris, the only 

 other British forms of the genus yet discovered. 



GENUS PEOSTHESIMA, L. Koch. 



PBOSTHESIMA LATITANS. 



Melanophora latitans, L. Koch, Beitriige Zur Kenntniss der 

 Arachniden Fauna Galiziens, (Krakau., 

 1870). 



Prosthesima latitan.i, L. Koch, E. Simon, Arachn. de France 



iv., p. 70, and Camlr., Ann. and Mag 



N. H., 1879, vol. iv., ser. 5, p. 209. 



Adult male length slightly over 2J lines. 



This species is closely allied to Prosthesima petiverii, Scop. (p. 



15), but differs in being more completely jet-black, both in 



respect to the cephalo-thorax and abdomen, the former of which 



is of a very slightly brown tinge. The fore part of the abdomen 



