The honey-bee differs from nearly all the wild varieties, as well as from hornets and wasps, in being adapted to live always in societies. Most other insects of the hymenopterous order become torpid in winter, or perish, with the exception of some queens, who survive to continue the race. Those which really hybernate are able to endure a considerable degree of cold; and, thawing under the influence of warmth, they can resume the functions of life. It is not so, however, with bees. Queens alone would be quite unable to continue the race, as they could neither build comb, nor supply food to the larvæ, nor keep up the heat required for the development of the young. For all these purposes, workers in considerable numbers are necessary. But this very concourse implies the production of heat by respiration; and, as a matter of fact, we find that all through the coldest weather of winter a temperature of over 60° Fahr. is maintained in the hive. As a result of this, bees do not really hybernate, or even become dormant. When cold is very intense, they maintain a constant tremulous motion, as if they knew that the expenditure of muscular fibre would, by the consequent oxygenation, cause the evolution of heat; or, as if cognisant of the most modern theories of "heat as a mode of motion," they were aware that the very flapping of their wings would tend to raise the temperature of their dwelling. A bee is chilled by a less degree of warmth than 50° Fahr.; and if actually frozen, or exposed to cold at or near the freezing point of water, it cannot be revived. These facts have a very important bearing on the art of apiculture. For, in the first place, it may easily be understood that, if bees are tempted abroad by sunshine in winter, or when a bitter wind is blowing, they may perish by hundreds, through becoming torpid with cold while resting a few minutes in some shade, or by being chilled in the ungenial air. For this reason it is advisable to shelter hives from the mid-day and afternoon sun, as the danger just alluded to increases with the lateness of the hour at which the bees may be enticed abroad by the sunshine. Then, secondly, it must be remembered that, as the bees are animate all through the winter, a constant consumption of stores is going on, and that disastrous consequences may ensue from mistaken notions as to their remaining torpid, and needing no more food than do hybernating dormice or polar bears. Thirdly, as an easy deduction from the foregoing facts, everything which stirs the bees to activity, such as supplying fresh food, or disturbing the hives for any other purpose, means an increased consumption of nutriment, proportional to the activity aroused. Fourthly, any general excitement in cold weather, leading to the wandering of individuals from the cluster, entails the risk of their being chilled, and rendered so inactive as not to be able to return to the warmest part of the hive, and consequently perishing.