HYDRIOMENIDAE 



179 



Tabulation of Gexera. 



15 



Cataclysm E. 

 2. 

 . 3! 

 . 4. 

 Trichopteryx. 

 ij. Gymnoscelis. 

 5. 

 . 13. 

 Chloroclystis. 



. 6. 

 Mysticoptera. 

 7. 

 8. 

 . 10. 

 24. Lythria. 

 9. 

 . Rhodometra. 

 21. Venusia. 



1. Posterior wall of areole absent 



,, wall of areole present 



2. Posterior tibiae without middle-spurs 



,, ,, with all spurs present 



3. Hindwings in S with dorsal lobe 1 



,, ,, without lobe 



4. Areole simple 



„ double 



5. Forewings with 11 running into 12 4. 



,, with 11 free from 12 . 



6. Hindwings in c? with dorsal lobe 2 



,, ,, without lobe 



7. Antennae in S pectinated 



,, ,, simple 



8. Thorax hairy beneath ; palpi long-haired 



,, glabrous ; palpi rough-scaled 



9. Face forming an obtuse prominence 2 



„ not prominent 



10. Antennae in S ciliated with long fascicles 18. Operophtera. 



,, ,, shortly and evenly ciliated . 11. 



11. Face flat, smooth . . .19. Euchoeca 



,, rounded, with somewhat projecting scales . 12. 



12. Abdomen with small segmental crests 6. Tephroclystis. 



„ not crested . . .14. Plemyria. 



13. Antennae in (J pectinated . 22. Xanthorhob. 



„ „ not pectinated . . .14. 



14. Hindwings in c? with dorsal lobe . 3. Lobophora. 



,, ,, without lobe . . .15. 



15. Thorax with horny anterior prominence . 17. Pelurga. 



,, without horny prominence . .16. 



16. Hindwings in S with basal dorsal i-idgeand pocket 17. 



,, ,, without basal ridge and pocket 18. 



17. Anterior tibiae hooked . . .9. Eucestia. 



„ ,, not hooked . . 10. Carsia. 



18. Hindwings in (^ with subcostal hair-pencil 8. Collix. 



,, ,, without subcostal hair-pencil . 19. 



19. Hindwings in S with deep dorsal furrow 11. Calocalpe. 



,, ,, without dorsal furrow . . 20. 



20. Forewings in (J with hair-pencil along lb beneath 



13. EUSTROMA. 



„ „ without hair-pencil on lb . 21. 



