Heliothelopsis unicoloralis 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 12–14 mm. The forewings are deep black-brown with a slight bronze tinge and sprinkled with whitish scaling. The hindwings are uniform black-brown. Adults have been recorded on wing in August.