ECONOMY OF ENERGY

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When free to choose, the Osmia settles by preference in the small reeds.
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What stimulus does the insect obey when it employs the reserve powers that slumber in its race? Of what use are its industrial variations? The Osmia will yield us her secret with no great difficulty. Let us examine her work in a cylindrical habitation. I have described in full detail, in the foregoing pages, the structure of her nests when the dwelling adopted is a reed-stump or any other cylinder; and I will content myself here with recapitulating the essential features of that nest-building.