The
wingspan is 34–41 mm. Warren states
E. birivia Schiff. (=
honoratina Donz.,
dolis Grote) (6c). Forewing dark ashgrey, with pale dusting;lines themselves ill-defined, but marked by paler scaling; orbicular and reniform stigmata ochreous, or with the centres dark but ringed with ochreous; hindwing fuscous grey, paling towards base. Occurs in S. Europe, in the French and Swiss Alps, in Italy,, Austria and Hungary; — in the ab.
taurica Stgr. the pale scales are ochreous yellow, instead of white; this form occurs in Asia Minor and Turkestan. ==Biology==