Japanese Cicada

Definitely not Gratopsaltria nigrofuscata. Yours is a a Zammara sp., but I cannot tell you exactly which one. There are some species found in Panama and you need different views to determine, specially of the wings and the spots.
https://www.flickr.com/photos/artour_a/1...
https://www.flickr.com/photos/artour_a/2...
https://www.flickr.com/photos/chrlaney/5...
https://www.flickr.com/photos/spatterd/5...

Tanks, there were like 8 of them,all flying in the backyard, I was near the Panamá Canal, maybe they came with a Japanese ship? Migrating? but pretty cool any way

Definitely a cicada. The black/green patterning looks like a Japanese Cicada, although I don't know if they are found in Panama. Good find.