The
wingspan is 27–35 mm. The forewings are ochreous, mixed and strigulated with dark fuscous. The veins are darker. The first and second lines are dark fuscous, nearly straight and parallel. There is a black discal dot and the wing apex is suffused with ochreous-brown. The termen is irregularly dentate. The cilia are blackish, spotted with white. The hind wings are whitish- ochreous, fuscous -sprinkled and posteriorly brownish -tinged with a faint grey postmedian line and a dark fuscous discal dot. The larva is ochreous-brown, darker marked. The dorsal line is anteriorly pale, dark-edged, posteriorly dark and interrupted. There are two blackish dorsal marks on segment 6, preceded by a pale area and pairs of tubercular prominences on 3, 4, and 12. The first generation may be more silvery-grey, the second generation smaller and lighter brown. (MHNT) Falcaria lacertinaria - Horní Planá, Czech Republic - male dorsal.jpg|♂ (MHNT) Falcaria lacertinaria - Horní Planá, Czech Republic - male ventral.jpg|♂ △ (MHNT) Falcaria lacertinaria - Lipnik, Czech Republic - female dorsal.jpg|♀ (MHNT) Falcaria lacertinaria - Lipnik, Czech Republic - female ventral.jpg|♀ △ == Biology ==