THE SPIDERS OF THE TYNE VALLEY. 337 



The Spiders of the Tyne Valley. 



By a. Randell Jackson, M.B,, M.Sc. 

 (Read April 5, 1906). 



Having resided for over three years in Hexham, and having 

 devoted some time to the study of the spiders of that district, 

 I now publish the results of my observations. I am aware 

 of course that many of my captures have been previously 

 recorded in the several lists of Northern Spiders which have 

 already appeared. Nevertheless I feel that I have done 

 sufficient work to make a new list of Northumbrian spiders 

 more desirable than a mere schedule of additions and 

 corrections. In the year 1858 Mr. Hardy published a list 

 of 70 species of Berwickshire spiders. These were identified 

 by Mr. Blackwall, and many of them are noted in his 

 " Spiders of Great Britain and Ireland." In 1875 the Rev. O. P. 

 Cambridge published a list of Berwickshire and Northumber- 

 land spiders. In this he recorded 75 species for the former, 

 and 143 for the latter county. These were also collected by 

 Mr. Hardy, and came largely from the Cheviot district. 

 Again in 1896, the Rev. J. E. Hull, in his " Catalogue of the 

 Spiders of Northumberland and Durham," enumerated 192 

 species which had been found in the two counties. This total 

 included the Northumberland spiders in Mr. Cambridge's list. 

 Mr. Hull thus added 49 new species. In a list of additions 

 to the above, published in 1901, he increased the total for the 

 two counties to 210. Since that time various species have 

 been dropped from the British, and hence from the Northum- 

 brian list. Their abandonment was due to the fact that their 

 differences from their allies were no longer considered to be 

 specific in value (see Appendix II.). By these losses Mr. 

 Hull's list was reduced to 205 species. I now record the 

 occurrence of 259 species of spiders from Tynedale, and this 

 raises the total for the two counties to the number of 286 

 species, 284 of which have been found in Northumberland. 

 This number includes 177 names previously recorded by Mr. 



