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some orchards are eaten so badly year after year and others 

 not far distant are not eaten at all ? These questions can not 

 be answered satisfactorily perhaps, but it would not be amiss 

 to conjecture or guess how they travel, or by what means 

 the change is brought about. The grub governed by her in- 

 stincts ascends the first upright object that comes in her way 

 and deposits her eggs indiscriminately, going no farther thai* 

 is necessary to effect her purpose. Clusters of eggs are fre- 

 quently seen upon fences, posts, houses, &c. The young: 

 insects generally arc supposed to die when hatched in places 

 where they cannot find food, but this summer I put some eggs. 

 into a small bottle, where they hatched and were allowed to 

 remain lour or five days without food. On letting them out 

 of the bottle they were as lively and vigorous as wbeiii 

 hatched upon a tree. I believe the young worms hatched 

 upon the trunk of a tree are able to sustain themselves un- 

 til they reach the foliage, even if they are obliged to travel to- 

 the extreme top of the tree. The worm, I think, is to a certain 

 extent migratory in its habits, not that they travel in swarms 

 as some species of caterpillars do, but that they are sometimes 

 forced to leave the trees upon which they were hatched for 

 want of subsistence and go to others not eaten, where after re- 

 maining a short time, they mature, spin down a second time* 

 and go into the ground, where they remain until autumn,, 

 when the grubs ascend the trees upon which the worms were 

 matured. Hence it is plain that the worm causes the 

 change in locality and not the grub as many suppose. The 

 worms are often times blown by high winds considerable 

 distances toward other orchards, when they travel the re- 

 mainder of the rout thus making a change in that way. 



One other means by which this insect is sometimes chan- 

 ged from one place to another is by transplanting Jruit trees 

 from nurseries that are infected by these pests. Valuable or- 

 chards have been almost destroyed in this manner. 



As the female insect is so very prolific all means should 

 be employed for their extermination. Plough the orchard 

 soon after the larva? form their chrysalides, and allow the 

 swine and poultry to run at large among fruit trees. 



We have another exterminator in the common garden 

 toad. It is surprizing to see what quantities of worms they 

 will despatch at a single meal. 



There is one other subject to which I wish to call your at- 



