Merolonche Grote. The genus Merolonche is a polyphyletic group of species in the Acronicta impressa group characterized by hairy body vestiture with hair-like scales partly obscuring the eyes. The habitus is associated with adults occurring in cold conditions due to season or occurrence in Arctic and Alpine habitats, so we synonymize Merolonche, syn n. with Acronicta. Generic combinations are Acronicta lupini comb. rev., A. australis, comb. n., A. dolli, comb. n., and A. spinea, comb. n.