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Bees announce their presence by a noisy humming. The beetles of the genus Calopteron have their wing-cases curiously distended, and move them up and down, so as to attract attention; and other species of Lampyridae are phosphorescent, holding out danger signals that they are not eatable. The reason in all these cases appears to be the same as Mr.
This and other species of Calopteron are not only imitated in their colour and markings by other families of beetles, but also in this peculiar widening of the elytra. Professor Westwood has also pointed out to me that the resemblance to the beetle is still further increased in the moth by raised lines of scales running lengthwise down the thorax.
Many of the genera are not phosphorescent, but all appear to be distasteful to insectivorous mammals and birds. I found they were invariably rejected by the monkey, and my fowls would not touch them. The genus Calopteron belonging to this family is not phosphorescent.
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