Wikipedia
Eustixia
Eustixia is a genus of moths of the Crambidae family, consisting of only one species, the spotted peppergrass moth (Eustixia pupula). It is found from Massachusetts to Florida, west to Texas and north to Ontario.
The wingspan is about 17 mm. Adults are on wing from June to August.
The larvae feed on the leaves of Lepidium species, Thlaspi arvense and cabbage.