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Updated: May 5, 2025
The close similarity in form, in colouring and, above all, in habits seem to refer the Tachytes to the same origin. This is ample; let us be satisfied with it. And now please tell me, what did this prototype of the Sphegidae hunt? Was its diet varied or uniform? If we cannot decide, let us examine the two cases. The diet was varied. I heartily congratulate the first born of the Sphex-wasps.
Let us not go back as far as that; let us not plunge into the fogs where illusion and error too easily find a lurking-place. Let us consider a subject with exact limits to it; this is the only way to understand one another. The Sphegidae are descended from a single type, which itself was already a highly-developed descendant and, like its successors, fed its family on prey.
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