Leucoides is a genus of moths of the Crambidae family. It contains only one species, Leucoides fuscicostalis, which is found in Sri Lanka.

Palpi porrect, slightly scaled and extending about twice the length of head. Maxillary palpi long and somewhat dilated at extremity. Frons produced and acute. Antennae of male minutely serrate and ciliated. Legs long and slender, the outer spurs about two-thirds length of inner. Abdomen long. Wings long and narrow. Fore wings with produced and acute apex. The outer margin oblique. Vein 3 from angle of cell and veins 4,5 stalked. Vein 6 from upper angle and veins 7,8,9 stalked. Vein 10 free and vein 11 becoming coincident with vein 12. Hind wings with vein 3 from near angle of cell. Veins 4,5 and 6,7 stalked. Male pure white. Palpi, sides of frons, and fore legs rufous. Fore wings with the costal area fuscous brown. Traces of antemedial and postmedial series of rufous specks found on the veins.^[2]