Eiifi)»t()h>(/ic(il Socictjj of Brifisli CoJnmhia 55 



2. Tube of tlie female, six times as lonu' as tlie 9th seg'ment 



Caudothrips Kaniy 



2. Tube at the most, four times as long as the 9th segment. 



3. Prothorax much broader than long. 8th abdominal segment in 

 the male, simple. Body bristles comparatively long-. Antennae 

 fairly short, the middle joints not very sharply clubbed. 



Megalothrips Uzel 



3. Prothorax not so markedly slanting. 8th abdominal .segment in 

 the male with a pair of side processes. Body bristles compara- 

 tively short, the antennae longer, the middle joints clearly 



clubbed Megathrips Targioni-Tozzetti 



1. Horned processes of the 6th male abdominal segment not reaching to 



the end of the 7th segment, straight or bent towards the inside. 



2. Body broad and strong. Prothorax much broader than long. Head 



twice as long as the prothorax. Horned process of the 6th male 



abdominal segment bent sharply inward. 7th and 8th segments 



simple Siphonothrips Buffa 



2. Body slender and linear. Prothorax not so sharply slanting. Head 

 three times as long as the prothorax. The processes of the 6th male 

 abdominal fairly straight and parallel. The 7th and Stli segments 

 with a pair of side processes Bacillothrips Buffa 



HYSTRICOTHRIPIDAE 



1. Head only a little elongated iti front of the eyes. 



2. Head one and one-half times as long as broad, broadest across the 

 compound eyes. Cheeks set with two strong bristle-bearing humps. 



Forewings set with 20-25 fringes Hystricothrips Karny 



2. Head short and broad, tapering towards the front. Cheeks arched, 

 set with numerous short bristles without warts. Forewings without 



fringes. Leeuwenia Karny 



1. Head process in front of eyes verj' long, its length three-quarters the 

 remaining head length Holurothrips Bagnall 



CHIROTHRIPOIDIIDAE 



Only one genus Chirothripoides Bagnall 



UROTHRIPIDAE 



1 . Antennae 7-jointed Urothrips Bagnall 



1. Antennae 4-5 jointed. 

 2. Antennae 5-jointed 



3. Fifth antennal joint clearly separated from the 4th. 



Bebelothrips Buffa 



3. Fifth antennal joint bound to the 4th with a liroad surface, ap- 

 parently making a whole Stephanothrips Ti-ybom 



2. Antennae 4-jointed Amphibolothrips Buffa 



