'If the first egg laid by the busy mother were destined to be the first-born of the Odyneri, that one, in order to see the light immediately after achieving wings, would have had the option either of breaking through the double walls of his prison or of perforating, from bottom to top, the seven shells ahead of him, in order to emerge through the truncate end of the bramble-stem.
She decided that the last-built cradle should yield the first-born child; that this one should clear the road for his next oldest brother, the second for the third and so on. And this is the order in which the birth of our Odyneri of the Brambles actually takes place.
In larval diet, in shape, in habits, they form two dissimilar groups, very far removed one from the other. The Anthidia feed their offspring on honey-bread; the Odyneri feed it on live prey.
Let one of the Odyneri who make their homes in a road-side bank mistake the door and enter her neighbour's house: she would have a bad time of it! Let a Megachile, returning with her leafy disk in her legs, go into the wrong basement: she would be very soon dislodged! So with the others: each has her own home, which none of the others has the right to enter.