14. In the river Hypanis in the Cimmerian Bosphorus, about the summer solstice, capsules larger than grape-seed are floated down the river: when these are ruptured, a four-footed, winged creature makes its escape, which lives and flies about till the evening. As the sun descends, it becomes emaciated, and is dead by sunset, having lived but one day; for which cause it is called ephemerum. Most animals which spring from caterpillars or worms, are first of all enclosed in a web, and this is their nature. 15. The wasps which are called ichneumons, which are smaller than the others, kill the phalangia, and carry them to a wall, or some other place with a hole in it; and when they have covered them over with mud, they oviposit there, and the ichneumon wasps are produced from them. Many of the coleoptera, and other small and anonymous creatures make little holes in tombs or walls, and there deposit their worms. 16. The period of reproduction, from its commencement to its conclusion, is generally completed in three or four weeks. In the worms and worm-like creatures, three weeks are usually sufficient, and four weeks are usually enough for those which are oviparous. In one week from their sexual intercourse, the growth of the ovum is completed. In the remaining three weeks, those that produce by generation, hatch and bring forth their ova, as in the spiders, and such like creatures. The metamorphoses generally occupy three or four days, like the crisis of diseases. This is the mode of generation in insects. 17. They die from the shrivelling of their limbs, as large animals do of old age. Those which are furnished with wings have these organs drawn together in autumn. The myopes die from an effusion of water in their eyes. CHAPTER XVIII. 1. All persons are not agreed as to the generation of bees, for some say that they neither produce young, nor have sexual intercourse; but that they bring their young from other sources; and some say that they collect them from the flowers of the calyntrus,[176] and others from the flower of the calamus.[177] Others again, say that they are found in the flowers of the olive, and produce this proof, that the swarms are most abundant when the olives are fertile. Other persons affirm that they collect the young of the drones from any of the substances we have named, but that the rulers (queens) produce the young of the bees. [176] Honeysuckle. [177] Reed. 2. There are two kinds of rulers, the best of these is red, the other black and variegated: their size is double that of the working bees; the part of the body beneath the cincture is more than half of the whole length: by some they are called the mother bees, as if they were the parents of the rest; and they argue, that unless the ruler is present, drones only are produced, and no bees. Others affirm that they have sexual intercourse, and that the drones are males, and the bees females.