Phereoeca uterella is a species of moth belonging to the family Tineidae. It is commonly known as the plaster bagworm but as the term "bagworm" more properly refers to moths of a different family (Psychidae), it is often called the household casebearer – which may in turn refer to the related Phereoeca allutella. It is found in warm, humid climates throughout the Americas although the exact range is difficult to map as it is easily confused with other case-bearing tineids. It is common in houses.