Nun moth eggs in a bark crevice Larvae. Newly hatched larvae of both nun moth and gypsy moth are approximately 4 mm long. At first they are tan, but within several hours they turn black. First instars of both species have abundant hairs that have a translucent bulb-like structure in the middle of the shaft. The stripe down the middle of the larva's back is brown to black in the nun moth and white to yellow in the gypsy moth.
Insets show patterns on the heads.
The nun moth pupa is reddish brown and shiny with light colored hair clumps and measures 18 to 25 mm long. Neither nun moth nor gypsy moth pupae have cocoons.