1907.] 



White-grtjbs and May-beetles. 



4o9 



The accompanying plat shows the crops of this tract and the dis- 

 tribution of the lantern traps in each. Forty acres were in corn, 

 seventy acres in grass, thirty acres in clover and alfalfa, and twenty 

 acres in oats. Two of the lanterns were in corn fields, two in clover 



Plat showing Distribution of Light-traps. 



Cemetery 



Road 



Road 



and alfalfa, one in oats, and seven in meadows and pastures of grass. 

 None were nearer than a quarter of a mile to trees on whose leaves 

 the May-beetles were feeding at the time, nor farther from them 

 than three quarters. To avoid attracting beetles from these trees, 

 each lantern was provided with a tin shade by which its light was 

 hidden on the side towards the trees nearest to it. These lights were 



