When first hatched from the egg, it requires very close inspection to see them with the naked eye. The rapidity of growth depends on the temperature in which they are, as much or more than their good living. A few days in hot weather might develop the full-grown worm, while in a lower temperature it would require weeks and even months in some cases, perhaps from fall till spring. TIME OF TRANSFORMATION. The worm, after spinning its cocoon, soon changes to a chrysalis, and remains inactive for several days, when it makes an opening in one end and crawls out. The time taken for this transformation is also governed by the temperature, although I think but few ever pass the winter in this state. It is a rare thing to find a moth before the end of May, and not many till the middle of June; but after this time they are more numerous till the end of the season. FREEZING DESTROYS WORMS, COCOON AND MOTH. It is pretty well demonstrated that the moth, its eggs, larvæ and chrysalis cannot pass the winter without warmth of some kind to prevent their freezing to death. The following facts indicate this. I have taken all the bees out of a hive in the fall, and without disturbing the comb or honey, put it in a cold chamber where it could freeze thoroughly. In the following March bees were again introduced, and when not on a bench with some other stock that had worms, not a single instance in forty cases has ever produced a worm before the middle of June, or until the eggs of some moth matured in another hive has had time to hatch. I have sometimes, instead of putting bees in these in March, kept them till June for swarms, perfectly free from any appearance of worms! HOW THEY PASS THE WINTER.