43G rev. o. p. Cambridge on [June 1G, 



and the fore one of each is separated from the fore central one nearest 

 to it by an interval not quite as great as that which divides the hind 

 lateral and the hind central eye nearest to it. 



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

 and are furnished with short hairs. 



The palpi are short ; the cubital joint is bent and enlarges gradually 

 to the fore extremity ; the radial is extremely short, but is produced 

 a little on the inner side of its fore extremity into a long yellow-brown 

 apophysis, which bends abruptly, at about half its length, downwards 

 and inwards, and terminates in a curved, tapering, sharp-pointed, black 

 spine-like form. The digital joint is rather large, of a suffused yellow- 

 brown colour ; it has a prominence on the outer side towards the 

 extremity. The palpal organs are prominent and rather complex ; at 

 their extremity are two black spines, one strong and tortuous, the 

 other more prominent, slender, and curved in a circular form ; there 

 is also a strong, shining, dark brown, slightly curved spine on their 

 outer side near the hinder extremity. 



The falces are small and short, their length being less than the 

 height of the clypeus. 



The maxillcB, labium, and sternum are normal in form 

 The abdomen is oval and moderately convex above, of a dull pale 

 drab colour, two thirds of the upperside being covered with a finely 

 punctuose dull orange-brown coriaceous epidermis, the spiracular 

 plates and a small patch round and in front of the spinners being 

 of a similar nature and colour ; the abdomen is furnished sparingly 

 with short hairs. 



Thirteen adult females accompanied three of the males above 

 described ; but, except in the smaller extent of the coriaceous epider- 

 mis on the upperside of the abdomen, I can discover no appreciable 

 difference between them and the females (also thirteen in number) of 

 E.fissiceps (p. 438). This difference, however, seems to be constant ; 

 and I am almost inclined to believe them to be the female sex of the 

 males above described. The general similarity both in form and 

 colours in the adult males of the two species would lead one to expect 

 still greater similarity between their respective females, though the 

 males may easily be distinguished by the cleft and uncleft caput, as 

 well as by the form of the palpi and the palpal organs. 



The examples above referred to were contained in the collection 

 received from Mr. J. H. Emerton, by whom they were found at 

 Amesbury, Massachusetts, U. S. A., and I have great pleasure in 

 naming after him this pretty and very distinct species. 



Erigone atriceps, sp. n. (Plate LV. fig. 7.) 



Adult male, length rather more than f line. 



The caput of this Spider is prominent in front, rather elevated on 

 the occiput, and divided by a deep transverse indenture into two bold 

 rounded divisions or lobes, the foremost being rather the strongest ; 

 the occipital eminence forms a kind of roundish oval knob, and is of 

 course higher in its position than the frontal one. The colour of the 

 cephalothorax is orange-yellow, the margins, and normal grooves and 



