Entomolof/icdl Socictij of ttrifi.sh Columbia 49 



6. No strong' bristU's hcliiiul the liind (leellus. 



7. Eyes very large, almost toueliiiiLr. Holopothrips Hood 

 7. Eyes not very large. 



8. 7th antennal joint clearly separated from the 6th. 

 9. Fore ocellns placed on the elongated vertex 

 rising above the antennal base, dii-ccted anter- 

 iorly. Leptothrips Hood 



9. Fore (leellus on a little rising on vertex, not 

 rising above base of the antennae. 

 10. Fore femur, at least in a female, slender. 

 11. Fore femur much bent with a broadly 



angi;lar concave inner margin. 



Rhaebothrips Karny 



11. Fore femur not noticeably bent with an 

 almost straight inner margin. 

 12. Head not much longer than broad. 



Body length 4.5 mm 



Holothrips Karny 



12. Head clearly longer than broad. 

 13. Wings stunted or narrowed in 

 middle. 



14. Mouth cone broadly rounded 

 off. 



15. Fore femur in tlie male 

 very much thickened. 



cf. Crytothrips 



15. Fore femur in both sexes 

 slender... Pseudocrypto- 



thrips Priesner 



14. ]\Iouth cone narrowed, not 

 rounded off until the end. 

 Fore femur in both sexes 



slender Zygothrips Uzel 



13. Wings fully developed, not nar- 

 rowed in the middle. 

 14. Light yellow and mottled 

 purplish. Fore tarsi in both 



sexes with one tooth 



Porphyrothrips Vuillet 



14. Coloured differently. Fore 

 tai-si, at least in the female, 

 unarmed. 



