When the Polyergus or Amazon ants desire to increase their band of slaves, one first remarks extreme excitement in the neighbourhood of the nest.

The Polyergus thus laden flee as fast as possible, escaping as well as they can from the bereaved parents, who endeavour to save their offspring.

The nymphs transported into the ant-hill  are henceforth cared for by their fellow-slaves; the Polyergus do not trouble themselves further.