ORDER LEPIDOPTERA 



43 



gnawing and loosening the pulp of the leaf without injuring the 

 upper membrane; if they were larger the caterpillar could not 



Fig. 19. A copy of DeGeer's figures of two leaf-miners (Nepticula and 

 Lithocolletis) prepared nearly two hundred years ago. 



work them so dextrously in so thin a leaf. These teeth project 

 considerably in front of the head Below the head is a 



