2. The wood-piercing bee cuts out her nest in decayed wood; the nest being a hollow pipe like a chimney, or a group of such pipes, each divided by regular floors, into cells for the children; one egg is put in each cell, and the cell filled with a paste made of the farina of flowers mixed with honey, for the young bee to eat when it is hatched. Now this carpentering work, I find, is done wholly by the wood-piercing bee’s strong jaws; but here again is no picture of her jaws, or the teeth in them; though the little heaps of sawdust outside where she is working “are of grains nearly as large as those produced by a handsaw”; and she has to make her floors of these grains, by gluing them in successive rings from the outside of her cell to the centre. Yes; that’s all very well; but then I want to know if she cuts the bits of any particular shape, as, suppose, in flattish pieces like tiles, and if then she glues these sideways or edgeways in their successive rings. But here is the prettiest thing of all in her work. It takes, of course, a certain time to collect the farina with which each cell is filled, and to build the floor between it and the nest; so that the baby in the room at the bottom of the pipe will be born a day or two before the baby next above, and be ready to come out first; and if it made its way upwards, would disturb the next baby too soon. So the mother puts them all upside down, with their feet—their tails, I should say—uppermost; and then when she has finished her whole nest, to the last cell at the top, she goes and cuts a way at the bottom of it, for the oldest of the family to make her way out, as she naturally will, head-foremost, and so cause the others no discomfort by right of primogeniture.