221 Mr. R. S. Bagnall on the Classification 



Order THYSANOPTERA. 



I. Eleven pairs of stigmata present; hind pair of coxa; moat widely 

 separated; palpi single-jointed, (Species bearing a close general 

 resemblance to the Tubulifera ; ocelli and -wings absent ; antenna 

 7-jointed, joints broad and Btrongly characteristic ; spiraeular 

 openings large and protected externally by specialized dorso- 

 lateral papilla : ninth abdominal segment elongated, longer than 

 the preceding ; intermediate terminal hairs obsolete.) 



Suborder Polystigmata, mini. 

 Containing the family Vrothripida, Bagnall. 



II. Not more than four pairs of stigmata present ; intermediate pair oj 

 coxa most widely separated; palpi never less than 2-jointed. 



1. Female without an ovipositor; last abdominal segment tubular in 

 i sexes i ninth abdominal segment aot exceptionally elongated, 

 and intermediate terminal hairs present; antennas composed of 

 eight more or Less Btrongly elongated and slender joints '*, certain 

 which bear one or more Bent I and upper 



wings, when present, similar in structure, with only one median 

 longitudinal vein, which is only partially developed, sometimes 

 obsolete, and never reaches the tip of wine. 



Suborder Ittbtti inn \. Ealiday. 

 Containing th< I families Phlceothripida, Haliday, and 



othripida, Bagnall. 



L\ Female -with n saw-like ovipositor; last abdominal segment 

 .ally conical, that of male unlike the female- and usually 

 bluntly rounded. Fore wing with at least one longitudinal 

 vein reaching from base to tip of wing, (The structu re of the 

 wings, palpi, antennae, and ovipositor affords good characters for 

 tabulating the famil Suborder Tkbbbrantia, Haliday. 



Containing the diagnosed faivflieauEolotAripida, Haliday, and 



Thripidte, Haliday. 



When Uzel monographed the Thyganoptera in 1895 the 

 ultra-European Bpecies were unworked. Since then the 

 North-American forma have received a good «l*:il of attention, 

 •whilst material from tropical and subtropical regions is 

 being received and dealt with. As a natural consequence, 

 highly specialized tonus and groups of species that cannot 

 be regarded as members of the previously diagnosed families 

 have been discovered, though the tendency with workers in 

 the eider has been to regard the three families Phlceo- 

 thripidaa, JEolothripidss, and Thripidse as fixed and to fit 

 new and specialized genera into one or the other. To 

 eliminate difficulties as far as possible, I think it very 

 desirable to make certain divisions and subdivisions to 

 receive certain genera and gronpa, but shall be able to write 

 more on this matter when 1 have had the opportunity of 



' A few 7-j..inted antenna?, undoubtedly derived by the 



a of the seventh and eighth joints. 



