The cabin is ready: it now wants only a tenant and stores. First, a large free space is contrived at the bottom: the hatching-chamber, on whose inner wall the egg is laid. Next comes the gathering of the provisions intended for the worm, a gathering made with nice precautions. Lately, when building, the insect worked upon the outside of the doughy mass and took no notice of the earthy blemishes. Now, it penetrates to the very centre of the lump, through a gallery that looks as though it were contrived with a punch. When trying a cheese, the buyer employs a hollow cylindrical taster, which he drives well in and pulls out with a sample taken from the middle of the cheese. The Onthophagus, when collecting for her grub, goes to work as though equipped with one of these tasters. She bores an exactly round hole into the piece which she is exploiting; she goes straight to the middle, where the material, not being exposed to the contact of the air, has kept more savoury and pliable. Here and here alone are gathered the armfuls which, gradually stowed away, kneaded and heaped up to the requisite extent, fill the sack to the top. Finally, a plug of the same mortar, the sides of which are made partly of sand and partly of stercoral cement, roughly closes the cell, in such a way that an outward inspection does not allow one to distinguish front from back. To judge the work and its merit, we must open it. A large empty space, oval in shape, occupies the rear end. This is the birth-chamber, huge in dimensions compared with its content, the egg fixed on the wall, sometimes at the bottom of the cell and sometimes on the side. The egg is a tiny white cylinder, rounded at either end and measuring a millimetre [18] in length immediately after it is laid. With no other support than the spot on which the oviduct has planted it, it stands on its hind-end and projects into space. A more or less enquiring glance is quite surprised to find so small a germ contained in so large a box. What does that tiny egg want with all that space? When carefully examined within, the walls of the chamber prompt another question. They are coated with a fine greenish pap, semi-fluid and shiny, the appearance of which does not agree with the outward or inward aspect of the lump from which the insect has extracted its materials. A similar lime-wash is observed in the nest which the Sacred Beetle, the Copris, the Sisyphus, the Geotrupe and other makers of stercoraceous preserves contrive in the very heart of the provisions, to receive the egg; but nowhere have I seen it so plentiful, in proportion, as in the hatching-chamber of the Onthophagus. Long puzzled by this brothy wash, of which the Sacred Beetle provided me with the first instance, I began by taking the thing for a layer of moisture oozing from the bulk of the victuals and collecting on the surface of the enclosure without other effort than capillary action. That was the interpretation which I accepted originally.