BUCCAL APPARATUS OF INSECTS. 



95 



671. The manner in which Insects are nourished, varies 

 very much ; some only live on the juices of plants and ani- 



FIG. 414. 



HKADOF COCKROACH. 

 a, labrum ; b, mandibles ; 

 c, maxillne ; d, labium ; 

 e, labial palpi ; /, an- 

 tennae ; g, compound eyes; 

 h, ocelli. 



FIG. 415. PARTS OF THE 



MOTTTH OF CARABUS ; a, la- 

 brum ; b, mandibles ; c, 

 maxillae; d, labium. 



mals, others feed on solid food, and are either carnivorous or 

 devourers of plants ; and these differences correspond with 



Fia. 416. STAG-BEETLE. 



remarkable modifications in the structure of the mouth. 

 Amongst gnawing insects, such as Beetles, Cockchafers, 

 Cockroaches, and Locusts, this opening is furnished in front 



