INTRODUCTION. 



Key to the Families of Moths. 





I. Antennae knobbed or dilated; frenulum 



absent 



II. Antennae rarely knobbed ; frenulum gene- 



rally present, and always in the forms 



that have knobbed antennas 



A. Fore wing with vein 5 from the centre 

 of discocellulars, or nearer 6 than 4. 



a. Frenulum rudimentary 



b. Frenulum absent. 



a'. Proboscis present ; legs with spurs. 

 a 2 . Hind wing with vein 8 remote 



from 7. 

 a 3 . Fore wing with veins 6 and 7 



stalked . . . k 



b 3 . Fore wing with veins 6 and 7 



not stalked 



b z . Hind wing with vein 8 nearly 



touching 7 after end of cell .... 



b'. Proboscis absent; legs without 



spurs. 

 a 2 . Hind wing with one internal 



vein 



b 2 . Hind wing with two or three 

 internal veins 



c. Frenulum present. 



a'. Antennae fusiform 



b'. Antennae filiform. 



a 2 . Proboscis absent 



b' 2 . Proboscis present. 



a 3 . Hind wing with vein 8 curved 

 and almost touching 7 after 

 end of cell ; vein 1 a reaching 



anal angle 



b 3 . Hind wing with vein 8 remote 



from 7 after end of cell. 

 4 . Tarsi short as tibiae and 

 hairy : stoutly built moths . 

 6 4 . Tarsi long and naked: slightly 



built moths. 



a 5 . Fore wing with vein 7 

 remote from 8, and gene- 

 rally stalked with 6 .... 

 b 5 . Fore wing with vein 7 

 given oft' from 8 ; hind 

 wing with vein 1 a short 

 or absent . . 



RHOPALOCERA. 



(BUTTERFLIES.) 



HETEROCERA. 



(MOTHS.) 



27. Epicopiidae. 



28. Uraniidae. 



* Ceratocampidae. 



2. Brahmaeidae. 



1. Saturniidae. 



3. Bombycidae. 



5. Sphingidae. 



4. Eupterotidae. 



7. Cymatophoridae. 



6. Notodontidae f- 



29. Epiplemidae. 



30. Geometridae . 



* Not known to occur in India. 



t The genus Cyphanta has vein 5 of the fore wing from lower angle of cell, 

 and may be a connecting link with the Noctuidce. 



\ Three genera of Geometridce which do not occur in India hare vein 8 of 

 the hind wing curved, and nearly touching 7 after end of cell, but are easily 

 distinguished from the Cymatophoridce by the shortness of vein 1 a. In two 

 or three ancestral or distorted genera vein 7 of the fore wing is stalked with 6 ; 

 and in several genera the frenulum is absent. 



