It is found in the Rangitikei, Wellington, Marlborough Sounds, Nelson, Buller, Westland, Kaikōura and north Canterbury regions.

[1] Philpott originally described the species as follows: M. acuta differs from M. hamadelpha in having the thorax white instead of ochreous; also, the basal fuscous streak of the forewing is apically pointed and bent obliquely downwards and has a blunt or suffused apex.

[3][4] This species is found in the Rangitikei, Wellington, Marlborough Sounds, Nelson, Buller, Westland, Kaikōura and north Canterbury regions.

[1] This species lives in a variety of damp habitats in forests or near waterways that are not exposed to all day sunlight.

[1] It is a day time flying moth with males being frequent fliers but females being sedentary.