Sympistis forbesi

Sympistis forbesi is a moth of the Noctuidae family. It has been recorded from Iowa, Illinois and Minnesota and is believed to be extirpated from the eastern portion of the range in New York and New Jersey.

The length of the forewings is 14.5–16 mm for males and 14–16.5 mm for females. The ground colour of the forewings is warm grey.The hindwings are Pearly white with a thin terminal. Adults are on wing in late summer in one generation per year.

The larvae feed on Triosteum species, including Triosteum perfoliatum and possibly Triosteum aurantiacum. They are green with a reddish dorsum.