Page:Insects - Their Ways and Means of Living.djvu/271

 PERIODICAI. CICADA

destined course. When this instinct has served its purpose and has taken the creatures to the port of freest passage to the earth, all their love of light is lost or swallowed up in the call to enter some dark creiice narrower eien than the one so recently left by such physical exertion. When the young cicadas have entered the earth we practically have to say good-bye to them until their return. Yet this recurring event is ever full of interest to us, for, much as the cicadas have been studied, it seems that there is still plenty tobe learned from them each time they make their visit to our part of the world.

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