INSECTA. 



247 



Fig. 164. — The Life-History of the Common Cockchafer 



{Alelolontha vulgaris). 



'x}^TA 



The underground larva is seen in the middle, the pupa to the left, and the male is 

 emerging on the right. The female is flying, showing elytra and wings. 



A very typical and common beetle is the cockchafer 

 which works havoc upon vegetable life throughout its career. 

 The eggs are laid in the soil and the larvae feed upon the 

 roots of gra ss or al^ iost any herbaceous plant. After about 

 fnnr yfinr^ ^ lorT^ ornnri laiTp rj] h' fp^ fhp hppfl^ pmerp^pc; in early 

 summer and commences its depredations upon the leaves 

 of trees. The larva of some click-beetles is called a 

 " wire-worm " and does great harm to crops. The Colorado 



Fig. 165.— Colorado Beetles ( CJuysomela decemlineata). 



a, Eggs on the under surface of the leaf; /5, c, d, various stages in the larva ; 

 e^ pupa — the upper is the ventral view, the lower the dorsal. 



