Thank you for your comment. I noticed the flaps/plates on the ventral side, so deduced it is a male. But what do cicadas actually rub together to make the sound? Do they rub the plates against each other? The striated organ on the face I've learned is the clypeus, but what is its function?

Under those flaps are the tymbals, which are essentially flattened membranes that vibrate rapidly to create sound (imagine a large sheet of plastic and the wobbling sound if you wag it up and down). This is very different from the crickets and katydids, which rub various parts of their bodies together (stridulation) to make sound.

The striated 'nose' is the cibarial pump, which houses the muscles that pump plant sap up through the rostrum and into the cicada.

Thank you. This is fascinating, and is information I hadn't been able to find elsewhere. I sure would have guessed that the cibarial pump is the organ used to make sounds. It's amazing how they can make such loud sounds by the method you describe!