590 Proceedings of the Royal Physical Society. 
The female resembles the male in the general character of 
its markings, but the abdomen is of a whiter ground colour. 
This spider is nearly allied to Dictyna borealis, Cambr., 
described from North Greenland,! but differs in having the 
legs destitute of dark annulations (the legs of the male 
being wholly immaculate, and in one only out of a dozen 
females was a very faint trace of annulation visible), and in 
the broad sub-abdominal black band, which is absent in the 
Greenland spider. From Dictyne arundinacea, Linn., the longer 
radial joint of the palpus and the longer spur (springing 
from its very extremity) distinguishes it at once, while from 
Dictyna uncinate, Thor., not only does the spur, being shorter 
than in that species, distinguish it, but the abdominal pattern 
and markings are totally different. It is also allied to 
Dietyna pusilla, Westr., but the latter is a smaller and 
darker spider, and differs likewise in the structure of its 
palpi. The habits of ‘this spider are quite unusual—the 
males appearing to frequent bare sandy spots on the sea- 
shore, while the females conceal themselves under fragments 
of sea-weed, blown beyond high water-mark, and in these 
form their slight snares and egg-cocoons. 
Adults of both sexes were found by Mr William Evans 
close to the shore on Luffness Links, East Lothian, in 
June 1894. A number of immature examples had been 
taken by him in the same locality during the previous 
autumn, 
EXPLANATION OF PLATE XII. 
Dictyna arenicola, sp. n. 
Fig. 1. Spider (6), magnified. 
Fig. 2. Profile of cephalothorax and palpus of ¢. 
a. Radial joint of palpus, showing characteristic spur. 
1 Ann, and Mag. Nat. Hist, ser. 4, vol. xx., p. 273, pl. vili., fig. 1 
(1877). pee 
