Spidia excentrica is a moth in the Drepanidae family. It was described by Strand in 1912. It is found in Cameroon. The length of the forewings is 12-13 mm for males and 15-18.5 mm for females. Adults are similar to Spidia subviridis in the coloration and the variation in the number and size of the hyaline patches on the wings, but separable from it by the shape of the hindwings.