ON TWO NEW SPECIES OF TRICHOTHRIPS 66 1 



On Two New Species of Trichothrips from the Derivent 

 Valley. 



By Richard S. Bagnall, F.E.S., F.L.S. 



In working out some thrips material gathered by myself in 

 Northumberland, Durham, Yorkshire, and Epping Forest I 

 discovered several forms new to the British fauna, including 

 a few previously undescribed species. With the exception of 

 the two species here diagnosed the new ones belong to the 

 Sub-Order Terebranlia, and are described in a paper which I 

 propose to contribute to the Journal of Economic Biology. 



Sub-Order TUBULIFERA. 

 Genus TRICHOTHRIPS, Uzel. 

 Trichothrips propinquus sp. nov. 



$ Length i'8 mm. 



Related to T. pedicularhis^ Hal. 



Colour dark reddish-brown shaded with grey in parts, 

 chiefly the sides of head and thorax ; end of abdomen and 

 tube yellow ; legs yellow, intermediate and hind femora 

 greyish-brown, and fore femora greyish-yellow. Antennas, 

 including basal joints, ash-coloured, with a tinge of yellow 

 chiefly noticeable in the earlier joints ; joints three and four 

 with basal two-fifths and third respectively yellow, and 

 extreme base of fifth similarly yellow. 



Head as in pedmtlarius but longer, very slightly longer 

 than broad, and about one-third longer than the prothorax. 

 Relative length of antennal joints 14: 20: 30: 30: 27: 24: 

 20: ig. Sense-cones distinctly longer than in pedlcularms, 

 three on third joint, four on fourth, and two on each of the 

 joints five and six. Ocelli present. 



Prothorax transverse, shorter and wider than m pediadariies, 

 about one-half as long as broad ; all spines apparently 

 present — the pair at anterior angles longer than mpedicularhcs. 

 Pterothorax wider (in pedicularius narrower) than the width 

 across fore-coxse. Wings absent. 



Abdomen elongate, only slightly wider than the pterothorax, 



