In the meantime the bees are at work building combs with all haste, for the queen is close on their heels, demanding more and more cells. She does not rest until the whole of the ten or twelve frames have been completely filled with cells and eggs. By this time the first eggs which were laid will have hatched out into young bees, who will leave their cradles to take part in the duties of the hive. These first cells will then be cleaned out by the scavengers, and the queen will lay more eggs in them. In this way the queen goes on all the summer, and as a matter of fact, if the hive be a prosperous one, she may lay as many as 3000 eggs each day! After the eggs have been laid the queen does not appear to take the slightest interest in what may become of them. On the other hand, the worker bees do, for they know that on these tiny little eggs depends the future of the hive. In three or four days an egg will hatch into a tiny white grub, which the nurse bees immediately commence to feed. It is not fed upon honey, though, for that would be like feeding a baby on roast beef! The nurse bees have certain glands in their bodies by which they are able to turn honey into a kind of bee-milk, and this is called “chyle food.” For three days the little grub is carefully fed upon this preparation, and then it is given “modified chyle food,” as it is called, which is also bee-milk, but richer than before. During these few days the grub casts its skin and grows very quickly, until on the fifth day it turns into a chrysalis, just as a caterpillar does before becoming a butterfly. The bee-grub spins a soft silken cocoon, and the sculptor bees come along and seal over the mouth of the cell with a cover, which admits air so that the grub may breathe.