10 



INTRODUCTION. 



B. Fore wing with vein 5 from lower angle 

 of cell or nearer 4 than 6. 



a. Hind wing with more than 8 veins. 



a'. Proboscis absent; no mandibles nor 

 ligula 



b'. Mandibles, free palps, and ligula 

 present 



b. Hind wing with not more than 8 veins, 

 a'. Hind wing with vein 8 remote from 



7 after origin of veins 6 and 7. 

 a 2 . Frenuluin absent. 



a 3 . Hind wing with one internal 

 vein;. vein 8 with a precostal 



spur 



fr\ Hind wing with two internal 



veins. 



a*. Hind wing with a bar be- 

 t ween veins 7 and 8 near the 

 base ; vein 1 a to middle of 



inner margin 



b*. Hind wing with no bar be- 

 tween veins 7 and 8 ; vein 



1 a to anal angle 



c 3 . Hind wing with thivr internal 



veins 



i 2 . Frenuluin present. 

 a 3 . Hind wing with vein 8 abm-trd. 

 Hind wing with vein N pivsrnt. 



15. Hepialidae. 

 * Micropterygidae. 



a 4 . Antennie knobbed 



21. Pterothysanidae. 



* Endromiidae. 



20. Lasiocampidae. 

 14. Arbelidae. 

 10. Syntomidae. 

 * Castniidae. 



A nt enure, filiform, or rarely 

 dilated. 

 i 5 . Fore wing with vein 1 c 



present. 



c . Hind wing with vein 8 

 free from the base or 

 connected with 7 by a 

 bar. 



a 7 . Proboscis present . . 

 b 7 . Proboscis absent. 

 a s . Palpi rarely absent ; 

 5 winged; larvse 

 wood -borers .... 

 b 8 . Palpi absent ; $ ap- 

 terous. 



a 9 . 



with 



and 



case- 



$ rarely 

 legs ; 

 larvse 

 dwellers ...... 



$ and larvae free. 

 b 6 . Hind wing with vein 8 

 anastomosing shortly 

 with 7 . . 



b 9 . 



1 1 . Zygaenidae ] . 



. Cossidae. 



2. Psychidas. 



* Heterogynidae. 



19. Limacodidae. 



* Not known to occur in India. 



t In ihc degraded subfamily Phaudince the mouth-parts are absent, aud in 

 Himantoptcrus there is no frenulum ; in Anomceotes vein 1 c of the i'ore wing is 

 absent. 



