The burrow of the Phalangist is surmounted by a voluminous rubbish-dump, the materials of which are piled in the form of a cylinder as long as the finger.

Each of these dumps is a load of refuse and rubbish pushed outward by the little sapper, which shoulders it up from below.

The orifice is closed whenever the insect is at home, enlarging its tunnel or peacefully enjoying the contents of its larder.
The lodging of the Bolboceras is open and surrounded simply by a mound of sand.

Its depth is not great; a foot or hardly more.

It descends vertically in an easily shifted soil.