I’ve an unmanaged garden outside my apartment. It used to have several shrubs and pine straw, but the owners ripped them out and now they just trim the weeds every few weeks. They trimmed a week and a half ago, and today I observed these insects swarming on the ground throughout the garden. The largest specimens observed are no more than 3mm long. I am located in south east Georgia, USA, about an hour inland from Savannah.
Wingless nymph, underside: Wingless nymph, face: Wingless nymph, top side: Winged adult, underside Winged adult, face: Winged adult, top side: Winged adult, top face: