NEW GENERA AND SPECIES OF THYSANOPTERA 1 93 



The following six genera, some of which are of an 

 anomalous character, may be separated as follows : — 

 I. JViiigs and ccdli absent. Genus Leurothrips nov. 



II. IVings and ocelli present : 



A. Head longer, more or less cylindrical ; sensory filaments of 



antennre abnormally developed. 



Genus Eupathithrips nov. 



B. Head shorter, not cylindrical ; antennal sense-cones normal : 



1. Headloi-igex than prothorax ; prothorax not greatly enlarged: 



a. Head greatly swollen behind eyes ; ocelli not equidistant. 



Genus Docessissophothrips nov. 



b. Head depressed ; ocelli equidistant : 



i. Front margin of head truncate ; anterior ocellus 



set in centre of forehead and protected by two 



forwardly directed spines ; cheeks with spines not 



set in warts ; abdominal bristles exceedingly long. 



Genus Diceratothrips nov. 



ii. Front margin of head more or less rounded ; all 



ocelli dorsally visible ; cheeks with spine-set 



warts ; abdominal bristles not exceptionally long. 



Genus Plilceothrips Haliday. 



2. Head shorter than prothorax ; prothorax greatly enlarged, 



more than twice as long and three to four times as broad 

 as the head. Genus Eurynothrips nov. 



Genus DICERATOTHRIPS* nov. 



Head not narrowed in front, longer than its breadth and 

 than the length of prothorax. Cheeks set with a few spines 

 which are not set in warts. Front margin of head truncate. 

 Eyes small. Ocelli present ; posterior pair widely separated ; 

 anterior one set in the centre of forehead, looking forward, and 

 protected by two rather long spines set directly forwards, which 

 have the appearance of a pair of horns. Antennce set well 

 below the vertex and eyes ; about twice the length of head, 

 and with the intermediate segments elongate. Fore-feino7-a 

 thickened, and tarsi armed. Wings long. 



Abdomen about as broad as the mesothorax ; tube stout, 

 and longer than head. Abdominal spines or hairs extremely 

 long. 



Species medium sized. 



Type — Diceratothrips bicornis mihi. 



* Dicerato- =two-horned 



M 



