372 



ZOOLOGY. 



Order 5. Goleojitera. — The beetles form a liomogeneous 

 and easily circumscribed group, all having the fore-wings 

 thickened, not used in flight, and forming sheaths {elytra 



Fig. 340. — Pine weevil, a, larva ; 6, pupa. 



or wing-corers) for tlie hinder pair. The mouth-parts are 

 free and adapted for biting. The metamorphosis is com- 

 plete. The young or larv£e of beetles are called grubs. 

 Examples of beetles and their transformations are the pine 



Pig. 341.— June Beetle and its transformationB. 1, pupa; 2, larva.— After Riley. 



weevil (Fig. 340, Pissodes strobi Peck.) and the June beetle 

 (Pig. 341, Lachmsterna fusea Frohl.). The oil beetle is 

 remarkalile for passing through three larval stages (Pig. 



