LIST OF THE ARANEIDEA OE SPIDERS OF 

 THE CHANNEL ISLANDS. 



BY FREDK. O. PICKARD-CAMBRIDGE, B.A. 



A small collection of spiders made in the island of 

 Alderney by E. D. Marquand, Esq., has been sent to me 

 by Mr. Luff. Two of the twenty-one species obtained are 

 new to the Channel Island List, namely, Pardosa prati- 

 vaga, L. K., and Drassodes pubescens, Thor. There is nothing 

 very remarkable about the spiders collected ; two fine adult 

 males of Asagena phalerata previously taken by Mr. 

 Warburton in Guernsey being the most interesting and 

 striking forms. These adult males possess in common with 

 those of Steatoda bipunctata the various species of crustulina 

 and Teutana grosser, a remarkable stridulating organ at the 

 base of the abdomen, which is hollowed out and ridged with 

 hard chitinous edges. These working upon the roughened 

 base of the cephalothorax, or carapace, produce, or are 

 credited with the production of, stridulations which may be 

 used as a call note for the female or as a warning signal to 

 enemies. 



Since my last communication to your Society, numerous 

 examples of Atypus piceus, Sultzer, have been forwarded from 

 Sark. 



This species, however, should now bear the name of 

 Atypus affinis, Eichwald. A thorough investigation of the 

 question which has led to the compilation of a monograph 

 of the genus, as yet however unpublished, has convinced 

 me that we do not know, and shall probably never know, 

 what the true Atypus piceus of Sultzer was, or A. sultzeri 

 of Latreille. This being so affinis, Eichwald, is the first 

 name attached to a species which can be recognised by the 

 description. This is that form which prevails throughout 

 England and in the Channel Islands. A fine example of the 

 adult male of affinis has just come to hand from Alderney. 



