And her laying must necessarily begin here, because this corner is the rear-most part of the tube.

The foremost gallery is wide, with an entrance-door on the front of the hive.

Here, finding the conditions to which she is accustomed, the mother will go on with her laying in the order which she prefers.
Let us now see what has happened.

Of the fifty-two double-galleried tubes, about a third did not have their narrow passage colonized.

The Osmia closed its aperture communicating with the large passage; and the latter alone received the eggs.