For peculiar habits, confined to the workers of sterile females, however long they might be followed, could not possibly affect the males and fertile females, which alone leave descendants.
I am surprised that no one has advanced this demonstrative case of neuter insects, against the well-known doctrine of inherited habit, as advanced by Lamarck.
I have endeavoured in this chapter briefly to show that the mental qualities of our domestic animals vary, and that the variations are inherited.
Still more briefly I have attempted to show that instincts vary slightly in a state of nature.
No one will dispute that instincts are of the highest importance to each animal.
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