Pupa is golden glossy red-brown or dark brown, with reddish hairs dorsally and rather long anal point.

: The two central bands are confluent at the costal and posterior margins, forming black spots, or the whole median area is dark, the red of the abdomen usually weaker, eremita G.: Forewing and abdomen smoke-brown or blackish grey, the former with black markings, atra Linst.

: Forewing uniformly black, without markings, hindwing greyish brown, abdomen black, lutea Anel is a light form in which the central bands are interrupted; the red colour of the abdomen is equally deep almost to the thorax, flavoabdominalis Schultz has the abdomen yellow instead of red; subfusca Schultz female is distinguished by everything which is black in true monacha being yellowish brown, and the abdomen being also yellowish brown instead of red; in obsoleta Schultz the dark transverse bands in the median area of the forewing are absent, while they remain in the basal and outer-marginal areas.

[3] This moth can be found in most of Europe, including Great Britain, and in temperate regions of the Palearctic East to Japan and India.

They also feed on silver fir (Abies alba), European larch (Larix decidua), aspen (Populus tremula), hornbeam (Carpinus betulus), European beech (Fagus sylvatica), pedunculate oak (Quercus robur), apple (Malus domestica), sycamore (Acer pseudoplatanus), bilberry (Vaccinium myrtillus) and bogberry (Vaccinium uliginosum).