Abies grandis
The larvae feed on "Abies grandis", "Abies amabilis", "Abies lasiocarpa", "Crataegus douglasii", "Pseudotsuga menziesii" var. "glauca", "Picea sitchensis" and "Tsuga heterophylla". They have a brown body and head and reach a length of about 20 mm when full grown. There are two morphs. Larvae can be found from April to June and pupation occurs from late June to July. The species overwinters in the pupal stage.