Thaumantis diores

[3] Males and females have the upperside dusky brown; forewing with a broad beautifully iridescent blue discal band from below vein 8 to the dorsum, extending posteriorly towards the base of the wing, outwardly suffused with a brilliant silvery gloss.

Hindwing with a median, similar, somewhat rounded patch, the outward silvery gloss very brilliant, in fresh specimens the blue spreading towards the base of the wings.

Underside rich silky brown, terminal margins of the wings broadly paler, sprinkled with lilacine scales near an inward well-defined very pale brownish-yellow sinuous line; the basal five-sixths of the wings darkening perceptibly outwards.

Antennae red; head, thorax and abdomen brown.

Male secondary sex-mark a small erectile tuft of hair, not covering apparently any specialized scales, near the base of the subcostal vein on the upperside of the hindwing.