Episcepsis thetis is a moth of the family Erebidae. It was described by Carl Linnaeus in 1771. It is found in Panama and Venezuela.
Upperside: Antennae black. Head and thorax black. On the neck are two small scarlet spots just above the eyes, and one on each side below them. Abdomen silvery shining blue, having a triangular black mark at the base. Anterior wings dirty black, immaculate; tips whitish. Posterior wings dirty black, with a white discoidal transparent cloud.
Underside: Breast and sides dirty black. Abdomen white; its sides and tip dirty black. Wings of the same colour as on the upperside.