Cicadas are found all over the world, even in England. They are colloquially known as locusts but in fact are not related to the true locust family. They are more closely related to leafhoppers and spittlebugs. They are edible and a great delicacy in some countries. They have lovely transparent wings, very delicate. The sound they make especially at dusk is a mating call and I agree with Kera, it is compelling to listen to.
As for magical significance, the dead shells of the nymphs, once the adult has emerged may be dried and powdered and used to represent the unwanted, things from the past that should be left there or in some cases ugliness in mind or body. Useful therefore in binding spells for example. The wings of a dead cicada can be used for hopes for the future, transformations and change and if you lean that way, glamour spells.
The best use I have found for cicadas is to meditate to their sounds, particularly at dusk when the night is creeping over the day to become dominant. Night sounds, night forces. Tune into those, via the cicadas and you can tap into an awesome resource of information and power. I call it listening to the night and it always empowers me as a Witch.
Its interesting, the differences---over here, the cicadas tend to start singing in the heat of summer; July, August, and they sing the loudest in the heat of midday and don't sing as much at twilight, tho they do sing some. Then at night we have the katydids and crickets and tree frogs, and a few other insects.