Each bottle is finally given a population of weevils.

This time I obtain some eggs, but I am no further advanced; they are laid on the sides of the bottles, but not on the pods.
Nevertheless, they hatch.

For a few days I see the grubs wandering about, exploring the pods and the glass with equal zeal.

Finally one and all perish without touching the food provided.
The conclusion to be drawn from these facts is obvious: the young and tender haricot is not the proper diet.

Unlike the _Bruchus pisi_, the female of the haricot-weevil refuses to trust her family to beans that are not hardened by age and desiccation; she refused to settle on my bean-patch because the food she required was not to be found there.