Kolorado-Tanne
The larvae feed on "Abies sachalinensis", "Abies homolepis", "Abies concolor", "Picea excelsa", "Picea pungens" and "Picea alba". They feed on newly developing terminal growth, spinning the leaves. The larvae have a pale green body and blackish-brown head. They reach a length of 15 mm. The species overwinters as a young larva. Pupation takes place in the leaf shelter.