Definitely a female Delphacid.

Although the photo is a bit out of focus, you can see the critical feature - the antennae have a double row of sensory pustules that are separated from each other by at least their own width. This is characteristic of the genus Muirodelphax, of which M. arvensis is by far the most common species, and likely what is represented here.

This species is currently known as "Delphacodes campestris" but the name change is "in press" and should be official this year.

Right on with the ID, and this is a short-winged adult delphacid, probably in the genus Delphacodes, though I'd like Andy Hamilton to have the last word. The sexes, and different populations, often differ in wing-length among the delphacids.