ON NEW AND RARE BRITISH ARACHNIDA. 167 



three forms is also very great, but affords no reliable clue to 

 the separation of species. Continental araneologists have 

 never, I believe, considered the three forms to comprise 

 more than the one species D. lapidosus Walck ; though 

 Drassus macer, Thorell, has perhaps most claim to be con- 

 sidered distinct. I confess that I have, myself, only recently 

 and reluctantly arrived at the conclusion that all three are 

 identical. 



Prosthesima electa, C. L. Koch. 



An adult and immature examples of this spider were 

 received from Mr. W. Ruskin Butterfield, by whom they 

 were found on the Camber Sandhills, Rye, Sussex. 



Prosthesima lutetiana, L. Koch. 



An adult female of this species was sent to me by Mr. 

 G. A. Dunlop, by whom it was found under a stone at Port 

 Erin, in the Isle of Man, in 1907, 



Agroeca inopina, Cambr. 



Several immature examples were received from Beer, 

 Devon, where they were found in June, 1907, by Dr. A. 

 Randell Jackson, 



Agroeea eelans, Blackw. 



Two immature females found at St. Leonard's-on-Sea 

 were sent to me by Mr. W. R. Butterfield in June, 1907, 



Micariosoma festivum, C. L. Koch. 



Agroeca cekr, Cambr., Brit, and Ir. Spid., p. 13. 

 After careful re-examination of all the recorded examples 

 constituting this species (A. celer, Cambr.), and much 

 consideration of their relation to Micariosoma festiiittn, C. L, 

 Koch, I have reluctantly come to the conclusion that they 

 are very pale immature examples of this last. An example 

 recorded from Warwickshire in 1903 more nearly approached 

 maturity than any others I have seen. (See Proc. Dors. 

 F. Club, 1903, p. 151., PI. A, Fig. i.) 



