Euphoresia semnionis is a species of beetle of the family Scarabaeidae. It is found in the Central African Republic and the Democratic Republic of the Congo.
Adults reach a length of about 9.8 mm. There are broad dark-spotted furrows on the elytra, covered with two rows of very fine white scales, which border the smooth, uniformly brown-coloured intervals, on the sides of which are larger, snow-white scales, singly or crowded into small spots.