Ctenoplusia limbirena, the Scar Bank gem,[1] or silver U-tail, is a moth of the family Noctuidae.

It is found in south-western Europe, Africa (Lesotho, the Cape Province, KwaZulu-Natal, Transvaal, Mozambique, Zimbabwe, Zambia, Botswana, Malawi and eastern and equatorial Africa), the Canary Islands, Arabia, the southern Himalayas, India, Sri Lanka, Indochina to south-eastern China, Taiwan, Sulawesi, Bali and Timor.

There are traces of an irregularly sinuous sub-marginal line and a small pinkish patch found on center of outer margin.

Ventral side is with indistinct lunule at end of cell and waved postmedial line.

[5] The larvae are polyphagous and feed on Geranium, Solanum, Nicotiana, Althea (Malvaceae), Salvia and Primula species.