NEW GENERA AND SPECIES OF THYSANOPTERA 211 



above a line with the middle of the eyes and on their margins ; 

 anterior ocellus occupying the extreme vertex. Anfen/ice 

 approximate at base, inserted under vertex; broken in type 

 specimen, but evidently twice or more than twice the length 

 of head, and very slender ; basal joint cylindrical and stout ; 

 second shorter ; third long and slender, six times the length of 

 the second ; fourth five-sixths of the third, and fifth about 

 four-fifths of the fourth. Sense-cones and spines light and 

 inconspicuous. 



Frotho7-ax about two-fifths the length of head; a spine-set 

 tubercle at each posterior angle, and a similar tubercle with 

 the spine directed forward at each anterior angle ; a depression 

 or fovea on the inner side of each anterior tubercle, and disc 

 raised slightly from these depressions tp base; surface reticulate. 

 Fore-coxae with one fairly conspicuous spine. Pterothorax 

 more than twice as wide as the head, almost square, and 

 with the sides almost parallel. Wings long, reaching to 

 the ninth abdominal segment. Legs long ; fore-femora very 

 slightly swollen ; legs set with a few long slender black spines 

 and a number of shorter and slenderer ones. 



Abdomen broad, elongate-ovate, widening from the first to 

 the fourth segment, and gradually narrowing from thence to 

 tube, which is broken off in the type specimen ; terminal hairs 

 not long, weak; spines comparatively long and slender. 



Type — One female in British Museum. 



Hab. — Japan. 



Idolothrips longiceps sp. n. (PI. VII,, fig. lo). 



^. Length 4*75 mm. ; breadth of mesothorax 0*55 mm. 



General colour coal-black ; fore-femora and tarsi dark 

 brown ; antennal joints three and four yellow shaded with 

 brown at apices; joints five and six yellowish-brown at bases, 

 and second joint yellowish-brown at apex. 



Head very long, cylindrical ; three times as long as broad, 

 and not quite three times the length of the prothorax. Surface 

 of head finely striate transversely ; cheeks set with a few short, 



