462 OHIO EXPERIMENT STATION: BULLETIN 332 



PLATE LXVI 



THE HICKOEY BARK BEETLE 



(Scolytus quadrispinosus) 



Fig. 1. — Different stages and galleries in the wood made by the beetle and 

 its larvae. 



After Riley. 



Fig. 2. — A hickory tree, Akron, Ohio, killed by the hickory bark borer. 



