Bees do not, like ourselves, dwell in towns that are open to the sky and exposed to the caprice of rain and storm, but in cities that are entirely covered with a protecting envelope. If they were guided solely by their instinct, they would build their combs in the air. In the Indies we find that they do not even seek a hollow tree or a cleft in the rocks. The swarm will hang down from the branch of a tree, and the comb will be lengthened, the queen's eggs laid, provisions stored, with no shelter other than that which the workers' own bodies provide. Our Northern bees have at times been known to do this, deceived perhaps by a too gentle sky; and swarms have been found living in the center of a bush. But even in the Indies this exposure to all weathers is by no means an advantage. So many workers are compelled to remain always on one spot, in order to keep up the heat that is required for those who are molding the wax and rearing the brood, that they are unable to erect more than a single comb; whereas, if they have the least shelter, they will build four or five more, thereby increasing the wealth and population of the hive. And so we find that every species of bee that lives in cold and temperate regions has given up building its hive in exposed places. Its intelligence has decided that it is better to select more sheltered spots. But it is none the less true that, in forsaking the open sky that was so dear to them, and seeking shelter in the hollow of a tree or a cave, the bees have been guided by what was at first a daring idea, which came to them through their observation, experience and reasoning. There can be no doubt that they have made great progress. We have already mentioned the intelligence they show in using flour instead of pollen, cement in place of wax. We have seen with what skill they are able to adapt a new building to their requirements, and the amazing cleverness they display in the matter of combs made of foundation wax. They handle these marvelous combs, which are so curiously useful and yet so incomplete, in the most ingenious fashion, and actually contrive to meet interfering man half-way.