THE INSECT WORLD. 



229 



as to render unprofitable if it does not kill them. The beetles 

 are long-lived, and hide during the day on the under side of the 

 leaves on which they feed. Hence, collecting and destroying 

 them is the most satisfactory remedy, while the use of a tobacco 

 extract on the ground will act both as a fertilizer and to destroy 

 the subterranean larvae. 



The clover-leaf beetle, Phytonomus pundatus, is another quite 

 large species, dull brown in color, with indefinitely striped wing- 



FiG. 234. 



Clover-leaf beetle, Phytonomus punctatus. — a, egg; b, b, larvae feeding; c, very young 

 larva;/, cocoon, its net-like character shown at^/ h, pupa; i, beetle, on clover-stalk ; 

 k, same, enlarged ; other letters refer to structural details. 



covers, and a short, stout beak. The larva is green, its form well 

 shown in the figure, and it feeds chiefly at night, eating irregular 

 holes in the leaves. When full grown it forms a peculiar net-like 

 cocoon at or a little beneath the surface of the ground and 

 pupates, becoming adult a few days thereafter. The insects 

 hibernate in the larval stage, and their injury becomes manifest 



