Moved from Ambiguous "Green Tibicen Species" - incl. suspected "Blend Zones?" & "Possible Hybrids?".

Moved from "Annual Cicadas" or "Dog-Day Cicadas".

As you so well stated ... I still find all these Tibicen species somewhat confusing, to be honest.

Oh yes they can be!
Especially when you have geographic variations which do not adhere to the keys or standard descriptions given.

For instance, this cicada best matches linnei, but the eyes are unusually light green. However, given the options in your area, we can narrow down the id by elimination.

Despite eye color, this is not T. tibicen (=chloromerus), nor is it T. davisi, but rather one a member of the green group (linnei or winnemana). In your area, you have both linnei and winnemana. Some younger linnei (quasi-tenerals) may possess lighter eyes than seen in more sclerotized individuals; I suspect that may be what is going on here. The light silvery dusting is an indication of a younger specimen. Usually, quasi-teneral winnemana have more slate or grey eyes and less black dorsally.