756 REV. O. P. CAMBRIDGE ON [Julie 18, 



size ; they are in the usual four pairs, forming, when looked at from 

 the front, two rows, the upper one longest and strongly curved, the 

 lower one nearly straight ; the space between the two of the hind 

 central pair is rather less than that between each and the hind 

 lateral on its side ; those of the fore central pair are the smallest of the 

 eight, and are contiguous to each other ; and those of each lateral 

 pair are placed obliquely and contiguous to each other. Falces strong 

 and massive, and similar in colour to the cephalothorax. Legs 

 moderately long and strong ; their relative length is 4, 1, 2, 3 ; 

 those of the fourth pair in the female appeared to be longer in 

 proportion than those of the male ; they are furnished with hairs, 

 and are not very dissimilar in colour to the cephalothorax, but are 

 more strongly tinged with reddish orange colour. The palpi are 

 short, moderately strong, and similar in colour to the legs ; the 

 radial is equal to the cubital joint in length, but much stronger, and 

 has a small, nearly straight, tapering apophysis near the middle of 

 its fore extremity ; and its outer extremity is also a little produced, 

 giving it rather a pointed appearance when looked at from the front ; 

 the digital joint is small and of an oval form ; and the palpal organs 

 are not very complex, though well developed. The sternum is heart- 

 shaped, glossy, very convex, and of a dark yellow-brown colour. 

 The abdomen is oval and moderately convex above ; it is of a dull 

 sooty brown colour ; and when in spirit of wine some examples show 

 various pale transverse lines on the hinder part of the upperside. 



The female resembles the male, except in being larger ; and the 

 genital aperture is of characteristic form. 



Adults of both sexes were found by myself among water- weeds in 

 a swamp near Alexandria, Egypt, in 1864. 



Erigone (Walckenaera, Bl.) simonii, sp. n. (Plate LXV. 

 fig. 12.) 



Male adult, length 1 line. 



The cephalothorax of this very distinct species is of a yellowish 

 red colour ; the legs, palpi, falces, and maxillae yellow ; the sternum 

 somewhat darker ; and the abdomen (which is rather large and con- 

 siderably convex above) is of a bright brick-red, finely mottled and 

 marked above with paler spots and lines, not very visible except in 

 spirit of wine. The caput is a little elevated ; the hinder slope of 

 the elevation is long and gradual, forming a rounded occiput. The 

 height of the clypeus is nearly two thirds of the facial space ; and it 

 is slightly impressed in the middle, forming a curved profile line ; a 

 deep longitudinal excavation or indentation, of a tapering form, runs 

 backwards from each lateral pair of eyes. 



The eyes are seated on black spots on the fore slope of the eleva- 

 tion of the caput ; those of the hinder pair are near the summit, those 

 of the fore central pair on the fore margin ; these are separated 

 from those of the hinder pair by the same space that separates these 

 last from each other ; those of the lateral pairs are placed obliquely, 

 and a littic below the level of the fore centrals, when looked at from 

 the front. 



