LEPIDOPTERA 21 



ORDER Lepidoptera 



CHARACTERISED by the flat coloured scales clothing the four mem- 

 branous wings, the peculiar type of neuratiou, and the tubular 

 tongue-like structure of the maxillae. A very few Trichoptera 

 show similar scales, but can be distinguished by neuratiou and 

 mouth parts. The order is divided into nine main groups, 

 which may be tabulated as follows : 



1. Cell of hind wings emitting more than 6 veins 



9. Mivropterygina. 

 ,, not emitting more than 6 veins 2. 



2. Hindwings with Ic absent . . .3. 



Ic present . . .8. 



3. Antennae terminally clavate (clubbed) 4. Papilionina. 



,, not terminally clavate . . .4. 



4. Neuration much degraded . 8. Tineina (part). 



not much degraded . . .5. 



5. Hindwings with Ib rather strongly furcate 



7. Tortridna (part). 

 ,, ,, Ib indistinctly or not furcate . 6. 



6. Forewings with 5 basally approximated to 4 . 7. 



,, ,,5 parallel to 4, or approximated 



to 6 . 2. Notodontina. 



7. Frenulum present ; 8 of hindwings remote from 7 



1 . Caradrinina. 

 absent; or 8 of hindwings approximated 



to 7 beyond cell . 3. Lasiocampina. 



8. Middle-spurs of posterior tibiae very short or absent 



6. Psy china (part). 



,, (or at least one) well-developed . 9. 



0. Wings divided terminally into segments 



5. Pyralidina (part). 

 not divided into segments . .10. 



