230 OPKN AIR GKAPK CULTURE. 



destroying the present race, I am convinced tliat we 

 insure ourselves from their further depredations to 

 an J injurious extent. When a person of some energy 

 has cleared them from his vineyard or garden, he is 

 pretty certain to enjoy the benefit of his labor an- 

 other season as well as the present, though he may 

 have a few from his less resolute neighbor. Pursu- 

 ing the course I have mentioned, I very soon lessened 

 the rose-bugs so much that they gave me very little 

 trouble. 



" I also tried ploughing my vineyards just before 

 winter set in, so as to expose to the weather the 

 insect in the larva state, which will certainly destroy 

 all the young tribe that have not descended below 

 the reach of the plough. For two years past the 

 number has been so small, that I have omitted this 

 process for their destruction." 



