The way to destroy them is frequently to lift up the hive in the morning, and kill all you can see. The most effectual way is to drive the bees into a new hive, but this can be only done in the height of the honey season; or the affected combs may be cut out, and the bees restored to their old habitation. Mice are likewise very destructive to bees; sometimes they enter at the door, but most commonly near the top of the hive; this they do generally during winter, when the bees are in a torpid state; when this is suspected, set a few traps about the hives. The common bat will also sometimes take possession of a hive, and commit very great havoc amongst the bees. Wasps and hornets must be destroyed, if possible, either by gunpowder, or by the more primitive mode of placing limed twigs before the holes, when you have discovered their nests. The spring is the time to kill the female wasps and hornets, for then, by the death of one female, a whole nest is destroyed. Or place bottles half full of sugar and beer where the wasps frequent; they will go in to drink, and drown themselves in the liquor, not being able to get out of the bottle again. Spiders must be killed, and their nets or webs broken down, otherwise they will catch and destroy many bees. Swallows, frogs, ants, earwigs, snails, woodlice, poultry, and small birds of almost all kinds, are reckoned amongst their foes. And, therefore, there should be no lack of vigilance on the part of the owner of bees, to keep the bee-house as clean as possible from all vermin. The signs of dysentery having commenced in any colony of bees may be known by the floor-boards and combs being covered with stains, by the dark coloured evacuations, producing an offensive smell, and frequent deaths amongst the bees. "Bees," says Gelieu, "have no real disease; they are always in good health as long as they are at liberty, are kept warm, and provided with plenty of food. All their pretended diseases are the result of cold, hunger, or the infection produced by a too close and long confinement during winter, and by exposure to damp, &c." They appear however sometimes to be seized, in the spring, with dysentery; this is occasioned by their feeding too greedily, it is supposed, on honey dew, without the mixture of pollen and other wholesome nutriment.