A male appears in the open.

He explores the specimen, goes the round of it, scratches a little at random.

He goes back; and immediately the body rocks.

Is he advising his collaborators of what he has discovered?
Is he arranging matters with a view to their establishing themselves elsewhere, on propitious soil?
The facts are far from confirming this idea.

When he shakes the body, the others imitate him and push, but without combining their efforts in a given direction, for, after advancing a little towards the edge of the brick, the burden goes back again, returning to the point of departure.