How utterly useless then, for defending a queenless colony against the moth, are all the traps and other devices which have been, of late years, so much relied upon. If a single female gains admission, she will lay eggs enough to destroy in a short time, the strongest colony that ever existed, if once it has lost its queen, and has no means of procuring another. But not only do the bees of a hive which is hopelessly queenless, make little or no opposition to the entrance of the bee-moth, and to the ravages of the worms, but by their forlorn condition, they positively invite the attacks of their destroyers. The moth seems to have an instinctive knowledge of the condition of such a hive, and no art of man can ever keep her out. She will pass by other colonies to get at the queenless one, for she seems to know that there she will find all the conditions that are necessary to the proper development of her young. There are many mysteries in the insect world, which we have not yet solved; nor can we tell just how the moth arrives at so correct a knowledge of the condition of the queenless hives in the Apiary. That such hives, very seldom, maintain a guard about the entrance, is certain; and that they do not fill the air with the pleasant voice of happy industry, is equally certain; for even to our dull ears, the difference between the hum of the prosperous hive, and the unhappy note of the despairing one, is sufficiently obvious. May it not be even more obvious to the acute senses of the provident mother, seeking a proper place for the development of her young? The unerring sagacity of the moth, closely resembles that peculiar instinct by which the vulture and other birds that prey upon carrion, are able to single out a diseased animal from the herd, which they follow with their dismal croakings, hovering over its head, or sitting in ill-omened flocks, on the surrounding trees, watching it as its life ebbs away, and stretching out their filthy and naked necks, and opening and snapping their blood-thirsty beaks that they may be all ready to tear out its eyes just glazing in death, and banquet upon its flesh still warm with the blood of life! Let any fatal accident befall an animal, and how soon will you see them, first from one quarter of the heavens, and then from another, speeding their eager flight to their destined prey, when only a short time before, not a single one could be seen or heard. I have repeatedly seen powerful colonies speedily devoured by the worms, because of the loss of their queen, when they have stood, side by side with feeble colonies which being in possession of a queen, have been left untouched!