THE APPLE. 77 



The scurfy bark louse is distinct from the 

 preceding and a smaller scale. Its habits are so 

 similar that the same remedies maj^ be applied. 



Twig borers and pruners, leaf rooters, crum- 

 plers, and other caterpillars, are to be watched, 

 if they become troublesome. The palmer worm 

 is of rare occurrence, and would doubtless suc- 

 cumb to arsenic in the form of Paris-green. 



The Gipsy Moth (Ocneria dispar). Intro- 

 duced into Eastern Massachusetts a few years 

 since, and where increased in a few townships, 

 the caterpillar has devoured every leaf of fruit 

 and forest tree. So destructive has been the 

 insect that the State has already expended 

 $100,000 in the effort to exterminate it. Prob- 

 ably $75,000 will be expended in the year 

 1892. It is expensive work to spray forests 

 as well as orchards, and to hunt every tree, 

 shrub, wall, fence, and- shed for eggs in the 

 fall and spring, but is worth doing well if the 

 country can be rid of them. The caterpillar 

 can readily be destroyed by spraying with 

 arsenites as soon as discovered. When full 

 grown it is found to be from two to two and 

 one half inches long, its back being regularly 

 marked with two lines of ten round dots. The 

 clusters of eggs are oval, yellowish brown 

 patches about an inch or more in diameter. 

 These are to be searched for and destroyed. 



