INSECT TRANSFORMATION 



of beetles, such as the weevils (Curculionidae) and the bark- 

 beetles (Scolytidae) . The grub of a typical weevil (Fig. 65), 

 for example, has, like the " longhorn " grub, a well-developed, 

 hard, rotund head-capsule, while the body is covered with an 

 uniformly flexible white cuticle, which bears a scanty clothing 

 of feeble bristles. The feeler is short with its individual seg- 



^ 



FIG. 64. LARVA OF LONGHORS BEETLE (Rhdgium), VESTRAL VIEW. 



md, mandible ; mx, maxilla ; I, labium ; ', ', Hi, thoracic legs ; 

 a, anal segment, x sj. 



ments (two only in number) much abbreviated. The mandible 

 (Fig. 65 6) is stout and strong with robust teeth. The maxilla 

 (c) has a short two-segmented palp, its galea and lacinia being 

 merged into a single rounded lobe. The labium (Fig. 65 d) 

 is compact, its palps short and thickened each with only two 

 segments, and its ligula roundly truncated. On the ventral 

 aspect of each thoracic segment a pair of bristle-bearing 



