Synonyms : Chinavia hilare, Chinavia hilaris, Nezara hilaris, Acrosternum hilaris, Pentatoma hilaris
According to Dr. David Rider of North Dakota State University the generic name is wrong. The genus name Acrosternum should be restricted to a handful of Old World, small, pale green species that live in dry arid areas. The larger, brighter green species that live in both the Old and New Worlds should actually go by the generic name Chinavia, therefore this species should be called Chinavia hilaris.
It is a large, shield-shaped bug with an elongate, oval form and a length between 13-18 mm. It can be differentiated from the species Nezara by its black outermost three antennal segments. Its anterolateral (= in front and away from the middle) pronotal margin is rather straight and not strongly arced such as in Acrosternum pennsylvanicum
Both adults and nymphs have large stink glands on the underside of the thorax extending more than half-way to the edge of the metapleuron. They discharge large amounts of this foul-smelling liquid when disturbed.
They attach their keg-shaped eggs on the underside of foliage in double rows of twelve eggs or more. The green stink bug produces one generation in the North and two generations in the South. The early instar nymphs are rather brightly colored and striped, turning green when approaching adulthood.