438 rev. o. p. Cambridge on [June 16, 



A single adult male of this pretty and very distinct species was 

 contained in Mr. Emerton's North- American collection, and was 

 found by him under leaves at Cambridge, Massachusetts, in December 

 1873. 



Erigone cristata. 



Walckenaera cristata, Bl. Spid. Great Brit. & Ireland, p. 309, 

 pi. xxi. fig. 224. 



A single adult male of this Spider was found in Mr. Emerton's 

 collection ; on careful comparison with English examples I am unable 

 to find any difference between them and the American example. 



Erigone fissiceps, sp. n. (Plate LV. fig. 8.) 



Adult male, length £ line. 



The cephalothorax is short and obtuse, but prominent and elevated 

 before, the extremity of the caput being divided into two lobes by a 

 deep cleft or fissure reaching down to the lateral eyes on either side ; 

 the hinder lobe is the strongest ; it is rounded on the occipital portion, 

 and its upper part on the fore side projects a little over the fissure ; 

 the clypeus is slightly prominent in the middle, and very slightly 

 exceeds in height half that of the facial space ; the colour of the 

 cephalothorax is dull orange-yellow, the upper portion of each lobe 

 of the caput being strongly suffused with black, the suffusion con- 

 tinuing in a short broad band a little way back over the occiput. 



The eyes are small, on small black spots, and in four pairs, one 

 pair on the fore part of the hinder lobe of the caput, rather more 

 than two diameters from each other, another pair on the summit 

 of the front lobe, the smallest of the eight, and about an eye's dia- 

 meter from each other ; those of each lateral pair are contiguous to 

 each other and placed on a slight tubercle just behind the termina- 

 tion of the cleft ; the interval between each hind lateral eye and the 

 hind central nearest to it is equal to that which separates those of 

 the hind central pair from each other. 



The legs are rather short and slender, relative length 4, 1, 2, 3 ; 

 their colour is yellow ; and they are furnished with short fine hairs, 

 of which several on the uppersides are erect. 



The palpi are rather long, and similar in colour to the legs ; the 

 cubital joint is long, slightly bent, and increasing in size gradually to 

 the tore extremity ; the radial joint is exceedingly short, slightly 

 prominent behind, but has its fore side produced into a long curved 

 tapering, but not very sharp-pointed, prominent apophysis ; the digital 

 joint is small, and of a somewhat irregular form, having a boldish 

 subangular prominence near its base ; the palpal organs are promi- 

 nent, but not very complex, with a small curved black sharp-pointed 

 spine towards their fore extremity. 



The falces are small and not very strong ; their length is about 

 equal to the height of the facial space ; their colour, as well as that 

 of the maxillae, labium, and sternum, all of which are of normal form, 

 is like that of the cephalothorax. 



The abdomen is large, of a round-oval form, very convex above, 



