400 THE SPIDERS OF THE TYNE VALLEY. 



Order III. CHERNETIDEA. 



Family CHERNETIDyE. 



Obisium muscorum (Leach). Very abundant in all the 

 woods amongst dead leaves and fallen pine-needles. 

 Also, though more rarely, amongst moss in marshes. 

 It may be found throughout the year. It occurs in 

 Ireland, ranges from Dorset to Edinburgh in Britain, and 

 is common and widespread on the Continent. It is a 

 remarkable thing that out of over twenty British Pseudo- 

 scorpions only one has as yet been found in Northum- 

 berland. Several others are recorded for Scotland, and 

 one of these has also occurred in Cumberland. The 

 present one seems however to be the only one at all 

 common in the North of England. 



APPENDIX I. 



The following spiders were obtained in Berwickshire and 

 Northumberland by Mr. Hardy. Those from the Scottish 

 county only are distinguished by an asterisk. I have indicated 

 the British distribution of these spiders, none of which were 

 found by me in Tynedale. 



Prosthesima Petiverii (Scop.). This species was taken 



, at Wooler. It occurs from Dorset to Edinburgh, and in 



Ireland. It is usually found in mountainous districts. 



Prosthesima nigrita (Fabr.) Found (in the female sex) 

 on the top of Cheviot. Ranges from Dorset to Edin- 

 burgh, and occurs also in Ireland and the Isle of Man. 



*Drassodes sylvestris (Bl.). Occurs also in Dorset and 

 the South. 



Clubiona terrestris (Westr.). A common spider, rang- 

 ing from Dorset to Inverness, and occurring also in 

 Ireland. 



