130 ON NEW AND RARE BRITISH ARACHNIDA. 



Diploeephalus protuberans, Cambr. PI. B., Figs. 49, 50. 



Erigone protuberans, Cambr., Proc. Zool. Soc., Lon., 



1875, p. 218, PL 29, Fig. 24. 



Diploeephalus protuberans, Cambr., A. R. Jackson, 

 Proc. Chester Soc., 1907, Part VL, p. 3, PI. I., 

 Fig. 10-15. 



An adult male found by Mr. R. S. Bagnell, Gibside, Dur- 

 ham, and submitted to me by Dr. Jackson. New to Britain. 



Enteleeara aeumiriata, Wid. 



The male in the adult state was received from Hereford- 

 shire (Mr. H. E. Jones, of Ewias Harold, near Hereford), 

 and others of both sexes from the Kew Gardens (Mr. 

 George Nicholson). 



Enteleeara Jaeksonii, Cambr. 



Both sexes in the adult state were sent to me in 1906, 

 from Oakmere, Cheshire, where they were found by 

 Dr. A. R. Jackson. A very distinct, and as yet rare, spider. 



Thyreosthenius biovatus, Cambr. 



Adult females were found by myself several years ago 

 among de"bris and grass stems, in woods at Bloxworth, but 

 have been overlooked until recently. Its most usual habitat 

 appears to be in the nests of Formica rufa ; but besides the 

 above, I have specimens from other localities quite away 

 from these nests. It does not seem to have been observed 

 yet, what the terms are on which it inhabits the ants' nests, 

 or whether these are used as breeding places for the spiders 

 or not ; or whether they only serve as shelter principally 

 during the winter. The ant is large and protected by its 

 coriaceous epidermis while the spider is very minute and 

 delicate, so that it seems difficult to imagine the latter 

 making a prey of its hosts in any way either in the egg or 

 larva state but, of course, there may be very minute 

 insects in the ants' nests, which in the larva or perfect state 



