380 



Division I. — Tetraptera Amorpha. 



Larva and pupa^ bearing no resemblance in external 

 appeai'ance to the imago. Pupa perfectly quiescent, having 

 the organs of manducation and locomotion undeveloped. 



Section I. — T. A. Adermata, 



Which on entering the pupa state throw off the last skin of 

 the larva, and consequently exhibit through the remaining 

 skin the parts of the future imago. 



Class I. — Lepidoptera. 



Larva with strong corneous mandibles, moving horizontally, 

 and six articulated feet, situated in pairs on the second, third, 

 and fourth segments : 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. Imago with 

 short, undeveloped, immovable labrum and mandibles ; elongate 

 palpigerous maxilla3, slender, flexible, and tubular; when at 

 rest, convoluted between the labial feelers ; labium triangular, 



" In a paper read in the course of last spring-, at the Linnaan Society, I have 

 attempted to prove that the pupa is not a distinct state, but simply the matured 

 larva ; the term is, however, convenient to express that matured state. 



