The most wonderful of all insects—that, at least, would be the general opinion—are bees and ants. As bees are so very well known, and kept by so many people, I will not say much about them here, which will leave more space for the ants. Of the two, bees perhaps are the finer architects, for nothing quite so wonderful as their rows of hexagonal cells is to be found in an ant’s-nest. “He must be a dull man,” says Darwin, “who can examine the exquisite structure of a comb, so beautifully adapted to its end, without enthusiastic admiration”; and he goes on to observe that “bees have practically solved a recondite problem, and have made their cells of the proper shape to hold the greatest possible amount of honey, with the least possible consumption of precious wax in their construction.” No doubt these wonderful cells are now made instinctively, yet the bees can adapt their architecture to special circumstances, which shows the possession of reasoning power. Thus, should a piece of the comb fall down, they will not only fix it, by wax, in its new position, but, what is much more extraordinary, will strengthen the attachments of the other combs, lest they should fall too—for there can be no other reason for such an act. Bees, again, are sometimes much annoyed by the death’s-head moth which enters the hive at night, and devours the honey, apparently without danger to itself, though why this should be the case we do not know. After having suffered for some time, however, the bees barricade the entrance by building behind it a wall of wax and propolis, through which they make a hole large enough to admit themselves, but which quite excludes the bulky body of the moth. Here, too, we have reason and foresight in a high degree, as much, I think—perhaps more so—as has ever been observed in any occasional act of an ant, devised to meet special circumstances. For it is only in years in which the death’s-head moth is specially abundant that the bees act in this way; and, moreover, when it seems no longer required, they remove the barrier they have made.