84 SHADE TREES. 



and making irregular passages more or less deeply into the 

 trunk. Honey locust is little, or not at all, subject to injury 

 by this insect. 



Remedial Measures. 



Ordinarily it is impossible to do much to control this in- 

 sect. Some persons have suggested a repellant wash to pro- 

 vent egg deposition. It is certainly advisable 

 ?einedy? tive to eu ^ an( l burn badly infested trees during the 

 winter. The beetle seems to like the sun and 

 has a preference for trees somewhat exposed, therefore, thick 

 shady groves w r ould be least likely to be attacked. 



HICKORY BARK BEETLE. 



This beetle occurs throughout the State, boring under the 

 bark of feeble or dying hickories, often killing shade trees 

 that would otherwise have recovered under stimulating treat- 

 ment. The beetles, which are small, brown or 

 only to black, about one-fifth of an inch long, appear 



from the latter part of June to the latter part 

 of July. Attacking the bark of the trunk and large branches, 

 each female makes a vertical gallery an inch or more in 

 length. Notches are cut in the sides of this burrow, for the 

 purpose of holding the eggs. After hatching, the grubs 

 construct channels diverging from the main gallery. (See 

 Fig. 35.) The winter is passed by the nearly full grown 

 grubs, which pupate the following spring. 



