The little I have seen tells me that the new-born grub must establish itself in the midst of its food as quickly as possible, and that it perishes unless it can do so.

I am therefore of opinion that such eggs as are deposited in immature pods are lost.
However, the race will hardly suffer by such a loss, so fertile is the little beetle.

We shall see directly how prodigal the female is of her eggs, the majority of which are destined to perish.
The important part of the maternal task is completed by the end of May, when the shells are swollen by the expanding peas, which have reached their final growth, or are but little short of it.

I was anxious to see the female Bruchus at work in her quality of Curculionid, as our classification declares her.[8] The other weevils are Rhyncophora, beaked insects, armed with a drill with which to prepare the hole in which the egg is laid.

The Bruchus possesses only a short snout or muzzle, excellently adapted for eating soft tissues, but valueless as a drill.
The method of installing the family is consequently absolutely different.