Udea rusticalis is a moth in the Crambidae family. It was described by Barnes and McDunnough in 1914. It is found in North America, where it has been recorded from Arizona. The wingspan is about 22 mm. The forewings are light grey, heavily sprinkled and shaded with liver-brown, especially along the costa and in patches below the apex and above the anal angle, which are entirely this color. There is an indistinct, dark line, outwardly oblique to below the cell, then slightly waved to the inner margin. There is also an orbicular round brown blotch and the reniform has the form of a figure of 8, filled with brown with a white dot in lower the portion. There is another line, which is brown, denticulate, arising from a small costal patch, evenly rounded opposite the cell, forming a strong sinus