Eiiiomolofiicdl Socictij of Britifih CoJumhia 43 



ably long' ami thin and without teeth-like projections 



at the joints Cryptothripinae 



7. Head more than twiee as long as wide, usually con- 

 stricted behind the eyes and in front of the posterior 

 margin; the sides between the two constrictions 

 arched. Antennae noticeably long and thin or sev- 

 eral joints on the dorsal side at the extremity with a 



tooth-like projection Compsothripinae 



3. Head viewed dorsally narrowed along tlie posterior margin, 



viewed laterally much swollen in dorsal aspect...: 



' Docessissophothripinae 



2. Cheeks equally set tliroughout their length with numerous sliort 

 thorn-like bristles Macrothi'lpinae 



PHLOEOTHRIPINAE 



1. Compound eyes moderately large, not taking in the whole of the fore 

 part of the head. 

 2. Fore femora in both sexes unarmed. 



3. 8th abdominal segment (perhaps only in the male) with tooth- 

 like processes on the sides Odontinothrips I'riesner 



3. 8th abdominal segment simple. 



4. Wings present Phloeothrips Ilaliday 



4. Wings reduced Malacothrips Hinds 



2. Pore femur toothed in the male. 



3. Fore femur in the male armed on inner sjde with two teeth, in 



the female usually unarmed Hoplandrothrips Hood 



3. Fore femora in both sexes armed in inner margin with one 



tooth Acanthothrips Uzel 



1. ('oni])ound eyes very large, occupying the whole front jiart of the 

 head, leaving only a small area for the ocelli, cf. Eupathithrips Bagnall 



LIOTHRIPINAE 



1. Fore wings not narrowed in the middle. 

 2. Antennae 8-jointed. 



3. Head not at all or not much longer than tlu^ prothorax. 



4. 7th and 8th antennal segments clearly separated from one 



another ..Eurhynchothrips Bagnall 



4. 7th and 8tli antennal segments apparently closely joined to- 

 gether. 



5. Head not at all or scarcely longer than broad 



Rhynchothrips Hood 



5. Head markedly longer than broad Horistothrips Morga?i 



3. Head noticeably longer than the prothorax. 



