110 



ARTHROPODA 



just beneath the bark of many species of trees and exca- 

 vate characteristic galleries. It is estimated that they 

 damage timber to the extent of fifty millions of dollars 

 annually. 



The Lamellicorn Beetles are characterized by antennae 

 ending in from three to seven flat segments. They are 

 much less destructive than the weevils. The commonest 



FlG. 124. Pine-bark beetle whose work has made pine lumber expensive ; a, 

 adult ; c, pupa ; d, larva. Small figures are natural size. After Hopkins. 



representative is the May beetle or June beetle (Lachnosterna 

 fusca) of a brown color and more than a half an inch long. 

 It is often attracted into the house at night by the lighted 

 lamp. The eggs are laid on grass near the ground where 

 they hatch into minute six-legged white grubs with brown 

 heads. They burrow into the earth, feed on the roots 

 of grasses for two years, and having attained a length of 

 nearly two inches are known to most people as white worms 

 or grubs. Transformation to pupa occurs in the fall and 

 the adult issues the following spring. The stag 



