o^r NEW AND RAR BRITISH ARACHNIDA. 18! 

 Family THOMISID!. 



Xysticus Koehii, Thor. 



Adult females from Rye Sandhills, Mr. \V. R. Butterfield, 

 May and June, 1907. 



Oxyptila flexa, Cambr. 



Adults of both sexes from Ireland, Mr. D. R. P. Beresford, 

 October, 1907 



Oxyptila nigrita, Thor. PI. A, Fig. 35-36. 



Xysticus nigri/us, Thorell., Tijdr., Pint. XVIII., 



1875, p. 24. 

 Oxyptila nigrita., Thor.-Sim., Arachn., de Fr., II., p. 



238. 



Adult female, length i| lines. 



This little spider is of the ordinary general form and 

 appearance, and bears much resemblance at first sight to 

 O. Blackwallii, Sim. The pattern, however, on the 

 cephalothorax and abdomen differs when closely examined, 

 and the form of the genital process is very distinct. (See 

 figs. 34-36.) Like O. Blackivallii, Sim. O. scabricula, Westr., 

 and other allied species, the present one is also furnished 

 with strong clavate hairs on the abdomen and other parts. 

 An adult female was received from Mr. H. Donisthorpe, by 

 whom it was found at Deal in 1907, an immature female 

 having been received from near Dover, from the Rev. J. H. 

 Bloom, in 1906. It is new to the British List. 



The spider now recorded seems to me to be identical 

 with the female of Oxyptila Slackivallii Bosenberg, not, 

 however, with the male. (See Die Spinnen Deutschlands \V. 

 Bosenberg, Stuttgart, 1903, p. 359, PL 33, Fig. 529 A.) 



Oxyptila seabrieula, Westr. 



Oxyptila seabrieula, Westr., Cambr., Proc. Dors. 



Field Club xxviii., 1907, p. 145, PI. B, Figs. 57-63. 



Adult males and an adult female were sent to me lately by 



Mr. H. Donisthorpe from sandpits at Chobham, and on the 



