INSECT TRANSFORMATION 



seven segments. The mandibles (Fig. 22 A, B) are stout and 

 strong with an armature of formidable teeth adapted for the 

 predaceous habits of the insect, which feeds greedily upon 



D 



FIG. 22. JAWS OF DRAGON-FLY 



A, Mandible (outer view) ; B, inner view ; ', apical teeth ; m, molar teeth. C, Maxilla ; c, cardo ; 

 st, stipes ; p, palp ; il, lobe (galea and lacinia). D, Labium ; sm, sub-mentum ; m, mentum ; 

 sq, squame ; //, palp ; eh, end hook ; mh, movable hook ; ml, median lobe (galeae and laciniae). 

 X 12. From Tillyard, " Biology of Dragon-flies ". 



weaker members of its class caught in flight. In the maxilla 

 (Fig. 22 C), the galea and lacinia are fused to form another 

 formidably-toothed structure, while the crescentic hairy palp 



