330 



STATE BOARD OF AGRICULTURE. 



end, and radiating from the side of the brood-chamber will be many long slender 

 tunnels which gradually increase in size as they get farther and farther away 

 from the brood-chamber. At the distal end of each of the long burrows will be a 

 deeper excavation and connecting with that, an opening to the surface. The orig- 

 inal brood-chamber is made by the parent beetles, and along each side, the female 

 lays a row of eggs. The young grubs from the eggs burrow out away from the 

 chamber between the bark and the wood, the size of the grub, and therefore of the 



rig.[53. — Fruit-bark beetle, enlarged. Author's illustration. 



burrow increasing as they get farther and farther away from the brood-chamber. 

 When full grown they make deeper cavities in which they pupate and from which 

 they afterward emerge through the small round holes to the surface. When the 

 work is fresh, there is an exudation of small drops of gum which become con- 

 spicuous and lead to the detection of the trouble. The tree becomes sickly in 

 appearance and as a rule finally dies. 



The beetle which is the cause of all this trouble, is very small, a little more 

 than one-sixteenth of an inch in length, rough, and almost cylindrical. There are 

 several broods each year. 



Fig. 54. — Tunnels in the branches. Author's illustration. 



REMEDIES. 



The insect belongs to the family of engraver-beetles and all members of this 

 family prefer to work in dying, or at least, unhealthy trees. They are much 

 more likely to do injury in neglected orchards than in those that are well cared 



