"G. W. D.," Baltimore, says: "In your general remarks in November number of Gardeners' Monthly, you speak among other things of the 'bagworm' plague. Although I have them picked off every summer from my Arbor Vitae hedge, which they particularly fancy during the time that they make their appearance - though they are also found on other plants - yet, every summer they appear again, and in the same quantities. How do they get there? or rather, how are they propagated? a question I would like to see answered in your next publication in order to prevent their reappearance - since an ounce of prevention is better than a pound of cure - for it is a terrible labor to pick the thousands of these pests".

[It must be that the "bags" are not gathered up wholly, but enough left to form a new crop, for they are unable to travel far. The female never leaves the house in which she is born. The eggs hatch in the spring, and the little worms hatched, go out in the world on their own account, each to make its own bag, and cannot travel over many yards away. The female in the bag, will sometimes drop to the ground, and march off to where there is more food, - but this cannot be many yards. The female has no wings to fly with. The male has wings, and flies, but this cannot exceed the colony. There is nothing more certain than that persistence in cleaning off the cocoons will destroy the whole crop, and leave one's trees wholly free from their attacks. - Ed. G. M].