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1 Cuvier thinks that he alludes to a variety of the ephemera or the phryganea of Linnæus, the case-wing flies, many of which are particularly short-lived. These are by no means peculiar to the river Bog or Hypanis.
2 "living for a day."
3 They only appear to be so, from the peculiar streaks on the eyes. Linnæus has hence called one variety, the Tabanus cæcutiens.
4 Or with pounded chalk or whitening. Ælian adds, "if they are placed in the sun," which appears necessary for the full success of the experiment. Life appears to be suspended in such cases for a period of surprising length.
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