On the other hand, layings of between eight and ten are not uncommon.

Lastly, taking all my records together, the result is that the family of the Osmia fluctuates roundabout fifteen in number.
I have already spoken of the great differences in size apparent in the cells of one and the same series.

The partitions, at first widely spaced, draw gradually nearer to one another as they come closer to the aperture, which implies roomy cells at the back and narrow cells in front.

The contents of these compartments are no less uneven between one portion and another of the string.

Without any exception known to me, the large cells, those with which the series starts, have more abundant provisions than the straitened cells with which the series ends.