Entomological Sociclij of Briti.sli Columhia 51 



red with 

 light yel- 

 low slant- 

 ing lines. 

 Chroma- 

 tothrips 

 Sehmutz 

 15. Fore femur in the male 

 thickened. Fore tarsus, 

 at least in the male, 

 armed at most with one 

 tooth... Cryptothrips Uzel 

 10. Fore femur in both sexes thickened. 



11. Labrinn not sharply pointed. Abdomin- 

 al bristles not noticeably long 



Mesothrips Zimmerman 



11. Tjabrum sharply pointed, i-ising above 

 tlu' mouth cone. The bristles on the 

 last abdominal segment extending be- 

 yond the tube. Middle antennal joints 



very long and slender 



Megalomerothrips Watson 



8. The last three antennal joints joined together with 



a broad surface apparently entire 



Dermothrips Bagnall 



4. Antennae 7-jointed. 



5. Head much longer than I)ri)ad, slightly but clearly tapering 



towards the middle, broadest on pusti'rinr margin 



Polyphomothrips Sehmutz 



5. Head hardly longer than bi-oad, broadest about the middle, 

 strongly constricted above tliis iv.iiiit. by the hind margin 

 of the compound eyes cf. Glyptothrips Hood 



COMPSOTHRIPINAE 



1. Fore fenuir armed on inside with a row of small shai-j) humps. 



cf. Macrothripinae 



1. Fore femur unarmed. 



2. At the end of the .Ith and (itli antennal joint a leaf-like three cor- 

 nered process that normally ajipears across the short tooth that lies 

 on the following joint. 

 3. Wings absent. 



4. Mouth cone narrowed to the poiiiL Clieeks almost parallel. 

 Leptogastrothrips Try bom 



