INSECTS 



the skin of the newly emerged insect has hardened, 

 thus preventing a further growth or change in the cellular 

 layer of the body wall beneath it. Reorganization can 

 proceed within the body, but the outer form is fixed and 



Fig. 137. Adult and larval form of beetles (Order Coleoptera) 

 A, a ground beetle, Pterosticus. B, the same beetle with the right wings spread. 

 C, the larva of Pterosticus. D, an adult beetle, Silpha surinamensis, with the 

 left wings elevated. E, the larva of the same species, showing the similarity 

 in structure to the adult (D) except for the lack of wings and the shortness of 



the legs 



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