INSECT DAMAGE TO TELEPHONE AND TELEGRAPH POLES. 



Fig l.-^^ ork of the pole borer {Parandra hrunnca Fab.) in an untreated chestnut pole: a, Gallery of the 

 pole borer showing pupal chamber with the entrance plugged with excelsior-like wood fibers; work near 

 base of pole below ground, b, Mines of the pole borer near surface of ground. Natural size. (Author's 



