396 Mr. R. S. Bagnall on neio Thysanoptera. 



Megathrvpa quadrkuherGulatus (Bagii.). 



As sliown above, the ^ example referred to this species 

 proves in the light of furtiier material to be another species. 

 Mr. Lewis captured two examples o£ each sex of the true 

 M, quadrituherculatus by sweeping grass at Kobe on June 30th, 

 1916 — so I am able to cliaractsriz ; the male. 



^ . — x\s in ? . Sixth abdominal segment widened before 

 middle and furnished with a pair of stout tubiform processes 

 curving outwards and not reaching the line of the posterior 

 margin of 7 ; 7 with a minute tooth at each posterior angle, 

 and 8 slightly Avidened near middle and tlien produced to a 

 stout tooth before posterior angles. 



Differs from M. honoris in the coloration of the tibiae, the 

 more massive armature of abdominal segments 6 and 8, in 

 the weaker chajtotaxy of the tube, which is also longer in 

 this species compared to tlie length of head. 



Genus Bactrothrips, Karny. 



Sj'ii. Krinothrips, Bagn. 1918. 



On account of the pressure of the past five years, due to 

 war conditions, I am afraid that in my last contribution to 

 this series I erected the genus Krinothn'ps quite overlooking 

 Karnj's Bactrothrips, though it was previously known to 

 me. Krinothrips must be regarded as a synonym of Bactro- 

 thrips, but the dt'Scri[)tiou establishes the fact that Karny's 

 diagnosis was based upon a male example, the (^ differing 

 from the ? in exactly the same way as do (J c? of Megcithrips 

 and allied genera. 



Bactrothrips divergens (Bagn.). 



Bactrothrips longiventris, Karny, is a smaller insect than 

 B. divergens (Bagn.), and differs in several directions, in- 

 cluding the colouring of the tibioe, which are all yellowish in 

 the distal half in Karny's species. The tubiform abdominal 

 processes of the male appear to vary in size. 



I have recently received examples of B. divergens from the 

 Imperial Bureau of Entomoh)gy (no, 163), taken in plenty 

 on cacao in the Belgian Congo (/i. Magiie). 



