On the fourth day the creature succumbs.
With the intestines full the result is very different.
I make the same experiment with an insect which is only beginning its work of liberation.

It is swollen with fluid, which oozes from it and moistens the whole body.

Its task is easy; the overlying earth offers little resistance.

A small quantity of liquid from the intestines converts it into mud; forms a sticky paste which can be thrust aside with the assurance that it will remain where it is placed.

The shaft is gradually opened; very unevenly, to be sure, and it is almost choked up behind the insect as it climbs upwards.