Economic Importance of Anim,als 567 



larvae of the clothes moths (Fig. 301) produce great damage to furs and 

 woolen clothing. There are two distinct kinds which may be distin- 

 guished by the kind of web which the larva builds in the cloth. The 

 larvae of the European corn borer (Fig. 302) cause great damage to 

 corn and a great variety of other plants. They attack and reside in such 



Cocoon 



J? (k worm moth 



Fig. 300. — Silkworm (Bombyx mori) , an insect of the order Lepidoptera. The 

 larva or silkworm is shown feeding on a leaf. The pupa is shown with part of 

 the cocoon removed. Note the silk threads on the cocoon. 



Fig. 301. — The case-bearing clothes moth {Tinea pellionella) of the order Lepi- 

 doptera (enlarged). Adult moth (above); larva (lower right); larva partially 

 concealed in its portable case (lower left). The indistinct dark spots on the buff- 

 colored forewings distinguish the adult from the adult webbing clothes moth, the 

 wings of which are uniformly buff-colored. (From Back: Clothes Moths, U. S. 

 Department of Agriculture; courtesy of Department of Entomology and Plant 

 Quarantine.) 



