192 NEW GENERA AND SPECIES OF THYSANOPTERA 



base. All joints elongated; joints three to six roughly clavi- 

 form ; seven and eight fusiform. Third joint more than four 

 times the length of the second, with the stem thickened ; fourth 

 four-fifths of third ; fifth slightly shorter than the fourth ; sixth 

 three-quarters of fifth and narrower ; seventh one-half of 

 sixth, and apical two-thirds of penultimate. Plairs fine, black. 

 Sense-cones comparatively long and acute, especially those on 

 third joint. 



Prothorax convex, shining; strongly raised to posterior 

 edge, and with a shallow channel down centre; tubercle near 

 each hind angle set with two long bristles. Fore-legs greatly 

 enlarged ; coxa with one particularly conspicuous spine ; femur 

 enlarged, strongly set with bristles ; tibia very broad, and 

 tarsal tooth long and broad. Pterothorax as broad as the 

 width across fore-coxfe ; anterior angles of mesosternum with 

 a peculiar bifurcate chitinous plate projecting laterally. Inter- 

 mediate and posterior legs comparatively long, and each 

 intermediate femur with a large forwardly directed tubercle 

 at the base within. Wings long, coriaceous, and heavily 

 fringed. 



Abdomen long, tapering to tube; segments more or less 

 elongate. Tube long, gradually narrowed from base to apex ; 

 as long as the head and two and a half times the length of 

 the ninth abdominal segment. Terminal hairs two-thirds the 

 length of tube, and bristles of the ninth abdominal segment 

 longer than tube. Abdominal spines long. 



?. This sex differs from the male more particularly in the 

 smaller size ; the fore-legs which are not so greatly enlarged ; 

 the form of prothorax ; the absence of mesosternal projections 

 and of the tubercle on the inner side of each intermediate 

 femur ; the broader abdomen, and other details which I hope 

 to particularise in a future paper. 



Type — Amsterdam Museum. 



Hab. — Several examples of both sexes and in all stages, 

 Sumatra. There are also three carded males in the Paris 

 Museum, Benghalis, Sumatra {Maindron, 1885). 



