Plaster Bagworm
Scientific Name: Phereoeca utericella
Order & Family: Lepidoptera: Tineidae
Size: 8-13 mm (0.3-0.5 inches)

Natural Habitat
Commonly found inside homes on walls, under furniture, and in garages or sheds, particularly in humid climates.
Diet & Feeding
Larvae feed on spider webs, wool, human hair, and silk, as well as organic lint and debris.
Behavior Patterns
The larva constructs a silken case covered in sand, dust, and lint for protection. It can move the case by poking its head out of either end. It undergoes metamorphosis inside this case.
Risks & Benefits
Harmless to humans as they do not bite or sting. However, they can be considered a minor nuisance or household pest because they may feed on natural fiber fabrics and leave unsightly cases on walls.
Identified on: 7/1/2026