224 BEV. O. 1>. CAMBRIDGE ON THE [Feb. 20, 



each other, form a nearly straight transverse line, and, obliquely 

 placed, in front of the lateral on eitber side is another ; the two 

 centrals of the hinder row are round ; the rest appeared to be 

 slightly oval in shape. The legs are moderately long and strong, 

 especially tbe femoral joints. 



The palpi have the humeral joints inordinately large and tumid, 

 the cubital joints are very small, the radials larger; the digital 

 joints are small, and the palpal organs simple, not very unlike those 

 of Dysdera erythrina (Walck.), they have a reddish prominence near 

 their extremity. The sternum is somewhat heart-shaped, with a 

 strong reddish indentation opposite the insertion of each leg; the 

 maxilla are short, strong, considerably inclined towards the labium, 

 and narrower at the extremities than at the bases ; the labium is 

 small and short, but broad in proportion, and of a somewhat sub- 

 triangular form. 



The abdomen is oval, and not very convex above ; it is encased in 

 an upper and under coriaceous kind of integument ; this is united in 

 front, but separated along the sides and behind, where it gapes open 

 a little, the spinners protruding through the cleft : both the upper 

 and the under sides are sparingly furnished with hairs, and thickly 

 dotted with minute punctures ; the spiracular openings are (as far 

 as I could ascertain, though I am not certain upon the point) 

 four in number. 



An adult male of this minute but most remarkable and distinct 

 Spider was found under a stone on a wall close to Hasbeiya. 



Fam. Drassides. 

 Genus Gnaphosa (Latr.) = Pythonissa (Koch). 

 Gnaphosa ripariensis, sp. nov. (Plate XV. fig. 1.) 



Male adult, length 2§ to 3 lines ; female adult, 4 lines. 



This species is very similar to G. exornata (Koch), both in size 

 and markings ; but it may be easily distinguished by the structure 

 of the palpi and palpal organs. 



The ceplialothorax, which is of ordinary form, but rather flattened 

 above, is of a yellow-brown colour, marked rather irregularly on the 

 sides with blackish brown (indicating, however, the ordinary grooves 

 and converging indentations) ; and the whole is clothed with a greyish 

 pubescence. 



The eyes are placed in two transverse curved rows of four each, 

 the curves directed towards each other, and forming a short trans- 

 verse oblong figure, wider at the ends than in the middle ; each of 

 the hind central eyes is nearer to the lateral of the same row, on 

 its side, than they are to each other ; the fore centrals are larger 

 than the fore laterals, and the interval between them is greater than 

 that between each and the lateral on its side. 



The legs are tolerably strong, rather long ; relative length 4, 1, 

 2, 3 ; they are of a yellow-brown colour, thinly furnished with hairs 

 and fine spines, and, in some parts, with a short grey pubescence ; 



