Picea mariana
The larvae feed on "Betula" species, "Abies" species (including "Abies balsamea"), "Larix" species, "Picea" species (including "Picea engelmanni", "Picea glauca", "Picea mariana", "Picea rubens"), "Pinus contorta", "Pseudotsuga menziesii" and "Tsuga" species. They web the needles of their host plant. The larvae are green with a darker green middorsal stripe and with brown markings on the head. The species overwinters in the pupal stage.