vi] LARVAE AND THEIR ADAPTATIONS 55 



cuticle. This shortening of the legs is still more 

 marked in the larvae of the Longhorn Beetles (Cerarn- 

 bycidae) burrowing in the wood of trees or felled 

 trunks; here the legs are reduced to small vestiges. 



Fig. 16. a, Grain Weevil (Calandra granaria) ; b, 

 larva ; c, pupa. Magnified 7 times. After Chitten- 

 den, Yearbook U.S. Dept. Agric. 1894. 



Finally in the large family of the Weevils (Curculioni- 

 dae,fig. 16) and the Bark-beetles (Scolytidae), the grubs, 

 eating underground root or stem structures, mining 



