It is what usually happens as life goes on.

I do not therefore know what may have been done in the direction whither this study of the sexes has led me.

If I am stating propositions that are really new or at least more comprehensive than the propositions already known, my words will perhaps sound heretical.
No matter: as a simple translator of facts, I do not hesitate to make my statement, being fully persuaded that time will turn my heresy into orthodoxy.

I will therefore recapitulate my conclusions.
Bees lay their eggs in series of first females and then males, when the two sexes are of different sizes and demand an unequal quantity of nourishment.

When the two sexes are alike in size, as in the case of Latreille's Osmia, the same sequence may occur, but less regularly.
This dual arrangement disappears when the place chosen for the nest is not large enough to contain the entire laying.