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Updated: May 31, 2025
Now we are faced with special phenomena wherein initiative conflicts in the most peculiar way with the instinct of the species, and, which is yet more curious, in the end causes instinct to stray from its appointed path, and even to die out altogether. Forel places in a jar some ants of enemy species, the sanguinea and the pratensis.
I traced a long file of ants burdened with booty, for about forty yards back, to a very thick clump of heath, whence I saw the last individual of F. sanguinea emerge, carrying a pupa; but I was not able to find the desolated nest in the thick heath.
Let it be observed what a contrast the instinctive habits of F. sanguinea present with those of the continental F. rufescens. The latter does not build its own nest, does not determine its own migrations, does not collect food for itself or its young, and cannot even feed itself: it is absolutely dependent on its numerous slaves.
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