CLASSIFICATION OF INSECTS. 173 



CHAPTER II. 



OF THE CLASSIFICATION OF LEPIDOPTERA. 



635. CHARACTER amorphous : t. e. larva and 

 pupa bearing no resemblance in external appear 

 ance to the imago : pupa perfectly quiescent, 

 having the limbs and parts of the mouth enclosed 

 with the body, in a hard brittle skin or case. 



636. Larva with strong corneous mandibles, 

 moving horizontally, and six articulated feet, 

 situated in pairs on the second, third, and fourth 

 segment : the fifth and sixth, eleventh and twelfth 

 segments invariably with feet : the other segments 

 each subject to the possession of a pair of 

 fleshy prehensile feet: feeds on the leaves, bark, 

 wood, or roots of vegetables, and rarely on other 

 larvae. 



637. Imago with short, undeveloped, immovable 

 labrum and mandibles ; elongate palpigerous 

 maxillae, slender, flexible, and tubular ; when at 

 rest, convoluted between the labial feelers ; labium 

 triangular, bearing two erect conspicuous feelers : 

 all the wings fully and nearly equally developed, 



