OHIO EXPERIMENT STATION: BULLETIN 198. 



EXPLANATION OF PLATE vni. 



a Shot hole borer, Scolytus rugulosus, enlarged. 



b Appearance of bark after shot-hole and bark-borers 

 have emerged. 



c Peach bark beetle, Phloeotribus liminaris, enlarged. 



d Shot-hole borer engraving work on peach limb; also holes 

 of pupae, or pupal cells. 



Pkoios by Goodwin, 



