_Smell._ Probably of all the senses of bees none is so acute as that of the perception of odours. Not only do they distinguish the citizens of their own hive from those of other communities; not only do they discriminate between the fragrance of various flowers; not only can they detect the aroma of honey concealed from their sight, though not from their olfactory nerves, but they show a marked antipathy to certain human individuals, which can only be accounted for by supposing that from these persons proceeds an effluvium disagreeable to the bees, though not perceptible by, or unpleasant to, man. A remarkable anecdote in confirmation of this well-known fact is given by Bevan, on the authority of M. de Hofer, Councillor of State to the Grand Duke of Baden. This gentleman's father had for years kept bees, and had devoted much personal attention to them. He had, indeed, attained such familiarity with them, and such skill in their manipulation, that he could, without fear of being stung, search for and find the queen, and take her in his fingers. Unfortunately, he fell ill with a severe fever, which kept him for a long time a prisoner to his house. After his convalescence he visited his bees, returning to them with his old confidence and pleasure. Greatly to his surprise and dismay, he found their feelings towards him entirely changed. They would no longer allow him to approach the hives, much less to perform any of his former manipulations; and that this was not the effect of a change of the population, through the natural perishing of the workers, but was due to some alteration in him, was shown by the fact that he was never again able to resume his old familiarity with his favourites. Some change in his blood, brought about by the fever, made the emanations from his skin permanently offensive to the bees, though no such difference was perceptible to any of his human friends. M. Feburier and other observers assert that a certain antipathy is manifested towards persons with red or black hair. We have reason to doubt the correctness of their opinion as to the latter class, and we more strongly incline to think that fair-complexioned people are less agreeable to bees than those who are darker. As a corroboration of this, we may mention the case of two brothers, one of whom could always approach the hives with impunity, while the other could not come near them without danger of being stung. Though both of them were dark, the obnoxious one was decidedly the fairer.