Donacaula roscidellus, the brown donacaula moth, is a moth in the family Crambidae.

It was described by Harrison Gray Dyar Jr. in 1917.

[1] It is found in Mexico (Veracruz) and the United States, where it has been recorded from Florida, Kentucky, Louisiana, Mississippi and Texas.

The length of the forewings is 18–30 mm.

[2] Adults have been recorded on wing from February to November.