Udea aenigmatica is a moth in the family Crambidae. It was described by Carl Heinrich in 1931. It is found in North America, where it has been recorded from Colorado.[1]
The wingspan is about 26 mm. The forewings are a pale straw colour, with a conspicuous black dot at the end of the cell and a sparse scattering of black scales over rest of wing. The hindwings are cream white.
The larvae feed on Cirsium species.[2]