i^^ The Irish Naturalist, August, 



The inferior process never bears a strong tooth on its lower 

 surface ; this is generally qui^e unarmed, but a small vestigial 

 tooth ma}' occur in E* arctica, White, E> capra, Sim., and E» 

 atni, Bl- I have never noticed it in E. longipalpis^ Sund. 



Of tliese four species, E. atra is easily separated by the 

 shape of the intermediate process, which is rounded evenly. 

 In the other three it is narrow, springs abruptly from the 

 external surface of the tibia, and shows a bifid extremit3\ The 

 lower point of the fork springs, however, from the internal 

 surface of the process, whilst the upper one is the true con- 

 tinuation of the process as seen from the external aspect. In 

 E. aictica and E. longipalpis the intermediate process is 

 slightly nearer the tip of the superior process than of the 

 inferior one. In E. capra the reverse is the case. In the 

 males I examined one shows a vestigial tooth on the inferior 

 process, and the other three do not. These three species are, 

 however, very easily distinguished by the structure of the 

 palpal organs, and especially b}' those processes which Pro- 

 fessor Kulczynski called the deiis vicdius and the deyis posticus. 

 In the figures I have endeavoured to show these in the same 

 position in all three species. 



Erigone capra, Sim., is recorded from the Department of 

 Isere in France, and from Hungary. The latter examples 

 were described by Professor Kulczynski as the var. oblita. 

 They differed from the French examples sent to him by M. 

 Simon in the stronger angle of the de7is ?}icdius, and in several 

 dimensions. As regards the former, I can express no opinion, 

 as I have never seen French examples. The dimensions of 

 the Irish specimens are, however, practically identical with 

 those of the typical French form. The total length of a male 

 specimen measured was about 2.25 mm. 



E. atra and E. aixtica^ var. viaritimay seem to average about 

 2.15 — 2.2 mm. E. arctica in typical forms is larger, an average 

 specimen I measured being 26 mm. E. lo7igipalpis, Sund., is 

 larger yet. I managed to find a huge vSpecimen measuring 

 3 mm. This is, of course, above the average, which is a little 

 larger than that of typical E. arctica. 



E. arctica. White, is a spider common in many British and 

 Irish localities, most of them maritime. It likes a niudd}', 

 claye}', grass-grown, salt-marsh such as is found on the Lan- 

 cashire and Cheshire coasts, but also occurs on rocky and 

 stony localities. I here figure the palpus of the typical form 



