Pyrausta bicoloralis, the bicolored pyrausta moth, is a moth in the family Crambidae. It was described by Achille Guenée in 1854.[1] It is found in North America, where it has been recorded from Nova Scotia south to Florida, west to Michigan and Texas.[2] In the south, the range extends to South America.
The wingspan is 14–19 mm. Adults have a yellow and purple pattern. They are on wing from June to September.