Next in order come the +working bees+: these are, by some, called _neuters_ or _mules_; by others, _female non-breeders_. From what will be said hereafter, I think that my readers will consider the latter as the more appropriate title, the workers being sterile females with undeveloped ovaries. In a single hive the number of these varies from 12,000 to 20,000: they are the smallest members of the community, are furnished with a long flexible proboscis, have a peculiar structure of the legs and thighs, on the latter of which are small hollows or baskets, adapted to the reception of the propolis and farina which they collect, and they are armed with a straight sting. Upon them devolves the whole labour of the colony; they rear the young, guard the entrances, elaborate the wax, collect and store the provision, and build the cells in which it is warehoused, as well as those that contain the brood. Thirdly, there are the +drones+ or +males+, to the number of perhaps 1500 or 2000. These make their appearance about the end of April, and are never to be seen after the middle of August, excepting under very peculiar circumstances which will be stated hereafter. They are one-third larger than the workers, somewhat thicker and of a darker colour; they have a shorter proboscis and are more blunt at the tail than either the queen or the workers; the last ring of the body is fringed with hairs, extending over the tail and visible to the naked eye. They make a greater noise in flying and have no sting; are rather shorter than the queen but much larger. Underneath the tail two small protuberances of a yellowish colour may be seen, which are regarded as the distinctive marks of their sex. In some swarms no drones are observable: probably these are first swarms, which, being always led off by old queens, have no occasion for drones, if there be any truth in the theory to be hereafter stated. [Illustration: _Queen._ _Drone._ _Worker._ ] Contrary to what occurs in the human species and in other parts of the animal creation, among bees, the females alone exhibit activity, skill, diligence and courage, whilst the males take no part whatever in the labours of the community, but are idle, cowardly and inactive, and possess not the usual offensive weapon of their species. The only way in which the drones promote the welfare of the society is a sexual one; and I shall endeavour to show, in the course of this chapter, that they serve no other purpose than that of impregnating such of the young queens as may lead forth swarms in the season, or be raised to the sovereignty of the parent hive. As the drones are "never seen settling on any kind of flowers, nor laying up honey in the cells, they most probably feed at home, and fully answer the description given of them by the poet:" "Immunisque sedens aliena ad pabula fucus." +Virgil.+