Nycteola revayana

Forewing ashy grey, dusted with darker, especially in costal half of median area; lines darker, double, but indistinct;the inner outcurved above and below middle, and angled outwards below vein 1; the outer irregularly waved and strongly indented on submedian fold; some faint dark spots indicate the submarginal line; hindwing pale greyish fuscous; — in the ab.

fusculana Schmid the ground colour is dull dark brownish fuscous, with the black lines visible and a ferruginous spot representing the reniform stigma; from the middle of base an oblique black streak runs to lower end of the inner line; the submarginal spots are visible, and a row of small black marginal lunules; — ab.

is bright greenish white; the median area purplish grey and brown, blacker towards costa, the reniform purple red; the lines filled up with white and the cloudy spots in basal and marginal areas black; a black spot at apex; fringe whitish; intermediate forms occur between this and dilutana; the ab.

glaucana Lampa has the forewing obscurely glaucescent, with a triangular dark fuscous blotch; — ab.

the ground colour is brownish grey, with fuscous shading, and a deep black streak from below base of cell to below reniform stigma, shortly branched towards inner margin beyond subbasal and inner lines; the submarginal spots darker; — ab.

Illustration from John Curtis 's British Entomology Volume 1
Figs. 4 larva after final moult, 4a cocoon, 4b pupa