342 THE SPIDERS OF THE TYNE VALLEY. 



the sort of fauna that does obtain. In addition to these we 

 have five species which were not previously known to inhabit 

 Britain. Three of them, when first obtained, were new to 

 science. Diplocephalus adjacens (Camb.), and Diplocephahis 

 jFacksonii (Camb.), occur on the sandy and grassy banks of 

 the Tyne. They have not as yet been found elsewhere. 

 Tmeticus firnms (Camb.) was discovered in the female sex 

 near Hexham, and at Huddersfield about simultaneously. 

 The male, however, has only as yet been found in the 

 former locality*. Of the two spiders which were known from 

 Continental localities, and unknown in Britain, one, Tapinocyba 

 insecia (Koch), was discovered near Newbrough, and has 

 since been found at Leeds. The other, Erigone arctica 

 (White), is a Siberian spider, which was found at Whitley 

 Bay, close to the shore. It was at once recognised as some- 

 thing new to Britain, but unrecorded specimens from Scotland, 

 Ireland, and the South of England were already in the hands 

 of the Rev. O. Pickard-Cambridge. In the case of three other 

 species only one sex was previously known to science until 

 the other was discovered near Hexham. In Onesinda 

 minutissima (Camb.) the male was the sex to be discovered, 

 and in Sintula fausta (Camb.) and Gotigylidhwi distinctti77i 

 (Sim.) the fef?iales were new to science. Two other rare species 

 inhabit the nests of ants ; these are Thyreosthenius biovatus 

 (Camb.) and Evmisia merens (Camb.). The former lives in 

 the nests of Formica rufa, and the latter in those of Formica 

 fusca and Lasius nigra. Other rare and noteworthy forms are 

 Lophocare?ium Mengii (Sim.), Troxochrus ignobilis (Camb.), 

 Aroeonctis crassiceps (Westr.), Panamomops bicuspis (Camb.), 

 Lophomma subcequale (Westr.), Tapinocyba pallens (Camb.), 

 Entelecara Thorellii (Westr.), Walckenaera nodosa (Camb.), 

 Walckenaera obtusa (Bl.), Wideria fugax (Camb.), Hilaira 

 reproba (Camb.), Tmeticus Hardii (BL), Forrhomma egeria 

 (Sim.), Porrho7nma miser (Camb.), Zora nemoralis (Bl.), 

 Trochosa cinerea (Panz.), and Xysticus bifasciatiis (C. L. K.) 



* Since the above was written, a single male, and numerous females, of this 

 interesting species have been turned yx^ in Delamere Forest in Cheshire. 



