From six cocoons, which I expected to yield Oak Eggars, I obtained, about the end of August, six females of the other species.

Well: about these six females, born in my house, never a male appeared, although they were undoubtedly present in the neighbourhood.
If the ample and feathery antennae are truly sense-organs, which receive information of distant objects, why were not my richly plumed neighbours aware of what was passing in my study?
Why did their feathery "feelers" leave them in ignorance of events which would have brought flocks of the other Eggar?
Once more, the organ does not determine the aptitude.

One individual or species is gifted, but another is not, despite an organic equality..