NOVnATES ZOOLOOICAE XXV. 1918. 389 



b*. Antennae not dilated towards extremity . . 8. Callimorpliidae 



\y>. Frenulum absent. 

 a°. Hindwing with vein S approximated to the cell at 



middle ......... 5. Plerothysanidae 



b". Hindwmg with vein 8 connected with the cell by a bar 



near base ........ 30. Endmmidae 



h*. Hindwing with vein 8 curved and approximated to or anas- 

 tomosing with vein 7, or coimected with it by a bar. 

 a'. Hindwing with a precostal spur to vein 8 . . . 47. Callidulidae 



b^. Hindwing with no precostal spur to vein 8. 



a". Hindwing with vein l.a absent or not reaching the 



tornus ........ 48. Drepanidae 



b". Hindwing with vein l.a reaching the tornus. 



a'. Frenulum present ....... 49. Thyrididae 



b'. Frenulum absent ....... 29. Lasiocampidae 



-. Forewing with vein 5 from middle of discocellulars, or from 



nearer 6 than 5. 

 a'. Antennae clubbed. 



a*. Forewing with veins 7, 8, 9, 10 stalked . . . . 21. Apoprogenidae 



b'. Forewing with all the veins from the cell . . . 44. Euschemonidae 



b'. Antennae with the shaft filiform or fusiform. 

 a'. Hindwing with vein 8 diverging from the cell from base, 

 a^. Forewing with vein 7 connected with 8, 9. 



a'. Proboscis absent ; tibiae without spurs . . . 15. AUacidae 



h''. Proboscis present ; tibiae with spurs . . . 19. Si/ssphingidae 



h'. Forewing with vein 7 remote from 8, 9, usually stalked 



with 8 ........ . 22. Uraniadae 



h'. Hindwing with vein 8 connected with or approximated to 

 the cell or vein 7. 

 a°, Hindwing with vein 8 remote from 7. 



a*. Forewing with vein 9 absent ..... 11. Eupteroiidae 



b". Forewing with vein 9 present, 

 a'. Forewing with veins 7, 8 bent downwards towards 



apex ........ 16. Bombycidae 



h'. Forewmg with veins 7, 8 not bent downwards towards 

 apex, 

 a". Hindwing with vein 8 connected with the cell near 



middle ; vein 5 obsolescent .... 12. Ceruridae 



b'. Hindwing with vein 8 connected with the cell near 

 base only, or vein 5 fully developed, 

 a". Antennae more or less dilated towards extremity ; 



eyes hairy 20. Setnatiiridae 



b°. Antennae not dilated towards extremity or the 

 eyes not hairy in tlie few genera in which they 

 are dilated, 

 a'". Abdomen with the basal stigmata dilated into 



vesicles 14. Dioplidae 



b'". Abdomen with the basal stigmata not dilated 



into vesicles ...... 13. Oeomelridae 



h''. Hindwing with vein 8 approximated to or anastomosing 

 witli vein 7. 

 a**. Frenulum absent. 



a'. Proboscis absent 17. Lemoniadae 



b'. Proboscis present IS. Brahmaeidae 



h'. Frenulum present, 

 a'. Hindwing with vein S connected with the cell by a 



bar near base 9. Sphingidae 



h~. Hindwing with vein 8 not connected with the cell . 10. Thyatiridae 



