Thymistadopsis albidescens have greyish white adults and has an oblique fine waved line from the apex to the inner margin beyond the middle with a black subapical mark on it.
Adults are greyish white, the forewings with a black speck at the end of the cell and a postmedial black spot on the costa. There is an oblique fine waved line from the apex to the inner margin beyond the middle with a black subapical mark on it. 
