Adults of rough stink bug, Brochymena sulcata (left), a beneficial predator compared with brown marmorated stink bug, Halyomorpha halys, a plant-feeding pest. Rough stink bugs have two white bands on the hind legs, no bands on their antennae, points on the face, and a rough or toothed edge on top the thorax (or "shoulders"). Adults of brown marmorated stink bug have one white band on their hind legs, white bands on the antennae, a blunt face, and relatively smooth shoulders.