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



and in the usual four pairs ; those of the fore central pair are very 

 minute and contiguous to each other, and are in a straight line with 

 the foremost eyes of the two lateral pairs, which are slightly the 

 largest of the eight ; those of the hinder (or upper) pair are 

 separated by rather more than an eye's diameter from each other ; 

 a long, narrow indentation, of a tapering form, runs backwards from 

 a little above and behind each hinder eye of the two lateral pairs. 



The legs are moderately long, rather short, and are furnished with 

 hairs and a few slender erect bristles. The palpi are short ; the 

 radial is much stronger, though about the same length as the digital 

 joint ; the former has its extremity on the upperside divided (or, 

 as it were, cleft), leaving two points ; that towards the outer side is 

 the strongest and most prominent, while the inner one adheres more 

 closely to the digital joint. These two points give the fore extremity 

 of the radial joint a strongly notched appearance. The palpal organs 

 are well developed and prominent, but not very complex ; they con- 

 sist chiefly of a large, somewhat globular, shining, corneous lobe, with 

 the fore part of which is connected a small, black, somewhat curved 

 prominent spine. 



The female resembles the male, except in the rather less convexity 

 of the caput, the eyes being thus more closely grouped, though rela- 

 tively in the same position ; the form of the sexual aperture is 

 characteristic, and may be understood better from the figure in the 

 engraving than from any description that could be given. 



Adults of both sexes were received from Dr. L. Koch, by whom 

 they were captured in the neighbourhood of Nuremberg. 



Erigone (Walckenaera) biscissa, sp. n. (Plate LXV. fig. 9.) 



Male adult, length A- of an inch. 



The cephalothorax, f'alces, maxillae, and sternum of this species are 

 of a yellow-brown colour, the legs and palpi being yellow-brown, 

 tinged with red. The abdomen is of a short oval form, very 

 sparingly furnished with hairs, and of a dull (though shining) 

 greenish sooty-black colour. The caput is not elevated, but is 

 simply rounded off on all sides, the occiput being evenly confluent 

 with the thorax ; the normal grooves and furrows are indistinct ; 

 two longish, narrow, slightly curved, longitudinal indentations run 

 backwards from between the lateral and hiud central pairs of eyes ; 

 on the sloping space between the eyes of the fore and hind central 

 pairs are some short hairs ; the height of the clypeus appeared to be 

 less than half of that of the facial space ; the eyes of the hind central 

 pair are about one eye's diameter from each other ; the fore lateral 

 eyes are the largest of the eight, and are in a straight line with those of 

 the fore central pair, which are very small, indistinct, and contiguous 

 to each other, and each is separated from the fore lateral eye on its 

 side by a space equal to its own diameter. 



The legs are moderately long and strong, their relative length 

 4, 1, 2, 3, and furnished with hairs. 



The palpi have the radial and cubital joints very nearly of equal 

 length ; but the former is greatly the strongest ; it is produced ob- 



