NEW GENERA AND SPECIES OF THYSANOPTERA 191 



Eyes medium in size. Ocelli present. Antennce. more than 

 twice the length of head, with the intermediate joints much 

 elongated and sense-cones moderately long and stout. 

 Mouth-cone longer than breadth at base, but not reaching to 

 base of prosternum. 



Prothorax abruptly raised to posterior edge, thus throwing 

 disc into a vertical position; smooth and shining; a strong 

 spine-set wart at each posterior angle. Anterior coxae small 

 and simple; anterior femora and tibiae strongly set with stout 

 spines ; tarsi each with a long stout tooth. Each anterior 

 angle of mesothorax armed with a projecting chitinous plate, 

 widened and divided in the form of two pointed blades. 

 Wings present. 



Abdomen long and heavy. 



Species large. 



Type — Dinothrips sumatrensis mihi. 



These characters are drawn from the male. Specimens 

 apparently of the female sex differ especially in the form of 

 prothorax, which is depressed and differently sculptured, and 

 in the absence of the mesosternal projections. Prof. J. C. H. 

 de Meyere, Amsterdam, has kindly presented me with a good 

 series of the type species as well as with material in the larval 

 and pupal stages, and I therefore hope, with Mr. Gill's kindly 

 help and collaboration, to prepare a special study of this 

 peculiar creature. 



Dinothrips sumatrensis sp. n. (PL VI., fig. 7). 



$. Length 8*o mm.; breadth of mesothorax i*o mm., exclud- 

 ing projections. 



General colour coal black, all tarsi brownish, a band of 

 yellow encircling central part of third antennal joint. 



Head one and two-thirds times the length of breadth. 

 Cheeks profusely covered with spines. Eyes moderate in size 

 and finely faceted. Ocelli large, the anterior ocellus with a 

 strong spine on each side. Mouth-cone shorter than the width 

 at base, Antennce twice the length of the head, separated at 



