Claim: Epipsestis castaneata's forewings, which are part of adult outgrowths of the insect exoskeleton, are fawn coloured and its median fascia is extremely narrow.
Evidence: The forewings are fawn coloured, shaded on each side of the narrow central area and along the inner margin in the basal half with dull chestnut brown. The median fascia is extremely narrow, towards the inner margin whitish and the outer line is blackish, slender, crenulate and slightly projecting on vein 4, followed by two thick brown shades with deeper centres, and then by a black lunulate-dentate line, angled above vein 5. Insect wings are adult outgrowths of the insect exoskeleton that enable insects to fly.