For darkness, I use flower-pots filled with fresh, heaped sand. The mother and her cake occupy the lower portion, which is arranged as a nest by means of a cardboard screen forming a ceiling and supporting the sand above. Or else I simply put the mother on the surface of the sand with a supply of provisions. She digs herself a burrow, does her warehousing, makes herself a nest and things happen as usual. In all cases, a sheet of glass used as a lid answers for my prisoners’ safety. I rely upon these several dark apparatus to inform me about a delicate point the particulars whereof will be set forth in their proper place. What do the glass jars covered with an opaque sheath teach us? They teach us much, of a most interesting character, and this to begin with: the big loaf does not owe its curve—which is always regular, notwithstanding its varying form—to any rolling process. The inspection of the natural burrow has already told us that so large a mass could not have been rolled into a cavity of which it fills almost the whole space. Besides, the strength of the insect would be unequal to moving so great a load. Questioned from time to time, the jar repeats the same conclusion for our benefit. I see the mother, hoisted atop the piece, feeling here, feeling there, bestowing little taps, smoothing away the projecting points, perfecting the thing; never do I catch her looking as though she wanted to turn the block. It is as clear as daylight: rolling has nothing whatever to do with the matter. The dough-maker’s assiduity, her patient cares make me suspect a delay in the manufacture whereof I was far from dreaming. Why so many after-touches to the block, why so long a wait before employing it? A week and more passes, in fact, before the insect, ever pressing and polishing, decides to use its hoard. The baker, when he has kneaded his dough to the desired extent, collects it into a single heap in a corner of the kneading-trough. The heat of the panary fermentation smoulders better in the heart of the voluminous mass. The Copris knows this secret of the bake-house. She collects the sum total of her harvests into a single lump; she carefully kneads the whole into a provisional loaf which she gives time to improve by means of an inner labour that makes the paste more palatable and gives it a degree of consistency favourable to subsequent manipulations. As long as the chemical work remains unfinished, both the journeyman-baker and the Copris wait. To the insect this means a long spell, a week at least.