Celaenorrhinus ruficornis,[2][3] commonly known as the Tamil spotted flat,[4] is a species of butterfly belonging to the family Hesperiidae which is found in India, Java, and the Sulawesi Region.

[5][6][7][8][9] The subspecies, Celaenorrhinus ruficornis fusca Hampson, 1889[10] occurs in India in the Western Ghats, Nilgiris and the Palni hills.

Upperside dark olive-brown, but not blackish as in Celaenorrhinus spilothyrus the brownish-ochreous setae on the basal area of the forewing and the hairs of the hindwing more ochreous.

Underside as on the upperside, the entire surface of both wings covered with minute ochreous-grey scales.

Antennpe on the underside, with all the club, except its tip, and the upper third of the shaft pure white, the remainder of the shaft with pure white dots; palpi with the inner half ochreous-grey marked with black, the outer half blackish, white at the sides and below the eyes; head, body above and below and the legs concolorous with the wings.