ON NEW AND RARE 15RITISH ARACHNIDA. l8i 



Family THOMISID^. 



Xysticus Kochii, Thor. 



Adult females from Rye Sandhills, Mr. W. R. Butterfield, 

 May and Jmie, 1907. 



Oxyptila flexa, Cambr. 



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

 October, 1907 



Oxyptila nig-rita, Thor. Pi. A, Fig. 35-36. 



Xj'siicus nign'/us, Thorell., Tijdr., P^nt. XVIII., 



1875, p. 24. 

 Oxyptila nigriia., 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. Blackwallii, Sim. O. scahriciila, 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 Blackivallii Bosenberg, not, 

 however, with the male. (See Die Spinnen Deutschlands W. 

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



Oxyptila scabricula, Westr. 



Oxyptila scabriciila, 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 



