CLASS INSECTS. 



415 



tooth, very hard, and called mandible (5, Fig. 434), which 

 serves to divide the food. Immediately behind these are the 



Fig. 433. Head of the Blatta, 

 (Cockroach) viewed before.* 



Fig. 434. Buccal Appendages 

 of the Carabus ; Beetle. 



Fig. 435. Lucanus Metallicus ; Heron Beetle. 



* cr, antennae; J, compound eyes; c, single eyes; d t labium; e, man- 

 dibles ; /, jaws j g, little tongue ; h, labial palpi. 



