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One character, which is unique among insects, is peculiar to Ephemerids; the adults issuing from the pupal envelope undergo still another moult in divesting themselves of a thin pellicle that covers the body, wings, and other appendages. This is what is called the subimago, and precedes the imago or perfect state of the insect.
They found in its mouth the buccal pieces of the Neuroptera, and, under the carapax, five pairs of branchial tufts attached to the segments that are invisible outwardly. Inside the animal were found tracheae, the digestic tube of an insect, and malpighian canals. Finally, in June, 1880, Mr. Vayssiere was enabled to establish the fact definitely that the insect belonged among the Ephemerids.
Their bodies on falling into the water constitute a food which is eagerly sought by fishes, and which is made use of by fishermen as a bait. But the above is not the only state of Ephemerids, for their entire existence really lasts a year.
"In progress towards the goal, nature will have to be consulted continuously. Already, in the case of the ephemerids, nature has produced a complete cycle of normal life ending in natural death. In the problem of his own fate, man must not be content with the gifts of nature; he must direct them by his own efforts.
The wings of the insect, which are of an iron gray, are covered with a down of fine hairs. The posterior ones soon disappear. Perhaps the subimago in this genus of Ephemerids, as in certain others, is the permanent aerial state of the female. La Nature. Connecticut is rapidly advancing in the cultivation of oysters.
Consequently the Poduras did not have an independent origin and do not, perhaps, represent a distinct branch of the genealogical tree of articulates. They resemble in their general form the larva of Ephemerids, and perhaps more closely the immature Perla, and also the wingless cockroaches.
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