248 



[NoTember, 



DREPANOTHRIPS BEUTERI Uzel, AN ADDITION TO THE BRITISH 



FAUNA. 



BY EICIIAED S. BAGXALL,, F.R.S.E. F.L.S. 



I recently had a microscopic slide submitted to me with a mounted 

 specimen o£ Oxj/thrips ericae (Hal.) and another species, very minute, 

 transparent and difficult to see, which proved to be a male Drepano- 

 tlirips. These were taken in oak leaf-rollings collected by Mr. E. E. 

 Grreen at Camberley, Surrey, 3.vi.l920. 



Drepanoihrlps reiiteri Uzel. 



1895 Mon. der Ordnung Thysanoptera, pp. 213-214, pi. vii, figs, 

 113-111. 



The length of the S (which is readily recognised by the pair of 

 sickle-shaped prolongations of the ninth abdominal segment) is less than 

 0"5 mm. The chief characteristics of the genus are the 6-jointed 

 antenna, which is without style, and the sickle-shaped chitinous pro- 

 longations of the ninth abdoininal segment in the S mentioned above. 



Uzel does not describe the specialised chaetotaxy of the ninth 

 abdominal tergite, which is an important structure in the S Thysano- 

 pteron of the sub-order Terebrantia. It consists of a dorsal series of 



-D. reuteri Vz. — End of abdomen in (^ showing' chaetotaxy of tergite 9. 



six bristles arranged in an ii-regular arc and set on tubercles, the inner- 

 most pair being the longest and the outermost the shortest, being but O'G 

 the length of the innermost. Fulmek and Karny (Zeitsclir. f, Pilanzen- 

 krankheiten, xxv (1915), pp. 393-398) describe the $ in detail, and 

 show that the D. viticola of Mokrzecki is synonj^mous. It has been 

 taken on vines in the Caucasus and Italy. 



39, Eslingtou Terrace, 



Newcastle-on-Tyne, 



Sejitetnber 13th, 1922. 



