fusca), and she instantly set to work, fed and saved the survivors; made some cells and tended the larvae, and put all to rights.

What can be more extraordinary than these well-ascertained facts? If we had not known of any other slave-making ant, it would have been hopeless to speculate how so wonderful an instinct could have been perfected.

Another species, Formica sanguinea, was likewise first discovered by P.

Huber to be a slave-making ant.

This species is found in the southern parts of England, and its habits have been attended to by Mr.