Thus, for instance, Ammophila hirsuta fixes hers, by one end, cross-wise, on the Grey Worm, on the side of the first prolegged segment.

The eggs hang over the caterpillar's back, away from the legs, whose proximity might be dangerous.

The worm, moreover, stung in the greater number of its nerve-centres, lies on one side, motionless and incapable of bodily contortions or said an jerks of its hinder segments.

If the mandibles try to snap, if the legs give a kick or two, they find nothing in front of them: the Ammophila's egg is at the opposite side.

The tiny grub is thus able, as soon as it hatches, to dig into the giant's belly in full security.
How different are the conditions in the Eumenes' cell.