FIG. 230. The round-headed apple-tree borer, larvae, adults, and exit hole. 



(Natural size) 



(After Rumsey and Brooks) 



FIG. 231. Work of the round-headed apple-tree borer. (Natural size) 



a, puncture in which egg is laid ; b, same in section ; c, hole from which beetle has emerged : 

 /, same in section ; g, pupa in its cell. (After Riley) 



159 



