ON NEW AND RARE BRITISH ARACHNIDS. 81 



by various authors, for comparison ; at any rate the 

 present and the preceding (Ero Cambridgii, Kulcz.) 

 comprise, so far as we know, the two species hitherto 

 recognised as Theridion variegatum, Bl. (or Ero thoracica, 

 Wid.-Cambr.). Both seem to be about equally abundant 

 as far as my experience goes, and widely distributed. 

 In the absence of any types of Mr. Blackwall's Ero 

 (Theridion) variegatum it is of course impossible to say 

 with absolute certainty which of our two now acknow- 

 ledged forms he had before him ; it is possible that he 

 had both ; but as Prof. Kulczynski has certainly separated 

 Ero Cambridgii by well marked characters, it creates less 

 prospective confusion to conclude that our now remaining 

 form is the present Ero lurcata, Villers (Theridion 

 variegatum, BL), ad partem, (female) ; E. thoracica, Wid.- 

 Cambr., ad partem. 



Epeira dromedaria, Walck. 



Epeira dromedaria, Walck-Cambr., Proc. Dors. 



F. Club. 



Adults of both sexes of this fine and very distinct 

 Epeira were received in June, 1911, from Dr. A. R. 

 Jackson, M.D. ; by whom they had been then lately 

 taken at Burnham Beeches, Buckinghamshire. The 

 male had not before been found in England. 



Fam. THOMISIDJE. 



Xysticus robustus, Hahn. 



Xysticus robustus, Hahn.-Cambr., Spid. Dors., 

 p. 305 ; Proc. Dors. F. Club, Vol. IV., p. 153 

 and Vol. XXXII., p. 43. 



An immature female of this fine and rare species was 

 found among heather on Bloxworth Heath on August 

 10th, 1911, by Rev. R. J. Pickard-Cambridge. 



