Carynota stupida, the stupefied planthopper is a species of treehopper belonging to the genus Carynota. It was first described by Francis Walker as Darnis stupida Walker, 1851.
Carynota stupida is found in the Northeastern USA and Eastern Canada. It feeds on Maple (Acer spp.), Bigtooth Aspen (Populus grandidentata) and birches (Betula spp.).