KEY TO THE FAMILIES. 19 



' . Hiiul wing with vein 1 c present *. 

 a^. Wings divided into plumes t. 



a^. Fore wing divided into at most four 



plumes 47. Pterophoridae. 



b^. Fore wing divided into six plumes ... 46. Orneodidse. 

 b^. Wings not divided into plumes \. 



a'. Hind wing with vein 8 absent 48. Sesiadae. 



b^. Hind wing with vein 8 anastomosing 



with or closely approximated to 7 ... 45. Pyralidse. 

 c^. Hind wing with vein 8 remote 

 from 7. 

 a*. Hind wing with vein 8 coincident 

 with the cell to middle or near 



extremity ; palpi absent 28. Megalopygidse, 



&'. Hind wing with vein 8 anastomosing 

 with the cell ; palpi present. 



«'. Frenulum absent 26. Chrysopolomidae. 



b'\ Frenulum present 29. Limacodidas. 



c*. Hind wing with vein 8 iVee or con- 

 nected with the cell by a bar. 

 a''. Middle spurs of hind tibia; very 

 short or absent. 

 a^. Proboscis absent. 

 a' . Fore wing with vein 1 c 

 absent. 

 a!*. Frenulum absent. 



a^ . Fore wing witli vein 9 

 stalked or connected 

 with 8 ; larvte wood- 

 borers 20. Arbelidae. 



h^. Fore wing with vein 

 9 widely sepai-ated 

 from 8 ; larviE case- 

 dwellers 27. Perophoridse. 



^^ Frenulum present 21. Argyrotypidae. 



IP. Foi'e wing with vein 1 c 

 present. 



a**. Frenulum absent 22. Ratardidae. 



b^. Frenulum present. 

 a^. Female winged. 



a'°. Larva3 wood-borers ; 

 abdomen extending 

 beyond hind wing . . . 23. Cossidae. 

 b^°. Larvae free ; hind 

 wing extending be- 

 yond abdomen 30. Dalceridae. 



6'. Female wingless. 



a'°. Female and larvse 



case-dwellers 18. Psychidae. 



b^°. Female and larva 



free 19. Heterogynidse. 



* Sometimes absent in the subfamily Epihleminm of the Tortricid'j> and in 

 some TineidcB. 



t Except in Aqdistis. 



\ Except in Cenoloba and an allied Pyralid genus of HydrocampincB. 



c 2 



