Orthosia incerta, the clouded drab, is a species of moth of the family Noctuidae, found in Europe and Asia.

The occurrence of the species extends through all European countries through the Palearctic to the Russian Far East and Japan.

Forewing grey, varied with fuscous dusting and striation, and often more or less tinged with rufous; inner and outer lines, where visible, marked by dark dots on veins; submargmal line variable, sometimes obscure, at others pale, and preceded by a dark shade, which may be complete or broken up into three blotches; upper stigmata large, the reniform generally dark, both edged with pale; a strong thick median shade, sometimes bent at middle and entire, often marked only at costa and inner margin; hindwing pale or dark grey with dark cellspot and pale fringe.

The markings are all clearer in the grey unsuffused forms: of these the chief are pallida Lampa from Sweden with the ground colour pale grey, finely striated with dark, and the two dotted cross lines;- coerulescens Tutt with the ground colour pale bluish grey; — subsetaceus Haw.which is dark slaty grey without reddish tinge, and subcarnea nov. [Warren] greyish flesh colour and praesubmarginal shades deep brown, the hindwing dull white with submarginal band and cellspot dark: of the darker forms contracta Esp.

[1] Larva green, dotted with yellowish white; dorsal line yellowish; subdorsal less distinct; spiracular line pale yellow, edged above with blackish; spiracles white, ringed with black; on various trees and shrubs.