Polyphaenis sericata

{{short description|Species of moth}}

{{Speciesbox

|image = Polyphaenis sericata 1.jpg

|image_caption =

|taxon = Polyphaenis sericata

|authority = (Esper, 1787)

}}

Polyphaenis sericata, the Guernsey underwing, is a moth of the family Noctuidae. The species was first described by Eugenius Johann Christoph Esper in 1787.{{cite web |last=Savela |first=Markku |date=May 25, 2019 |url=https://www.nic.funet.fi/pub/sci/bio/life/insecta/lepidoptera/ditrysia/noctuoidea/noctuidae/xyleninae/polyphaenis/#sericata |title=Polyphaenis sericata (Esper, 1787) |website=Lepidoptera and Some Other Life Forms |accessdate=October 23, 2019}} It is found in Europe and Asia.

Image:Polyphaenis sericata.01.jpg

The wingspan is {{convert|38|–|44|mm}}.

The larvae feed on various herbaceous plants, including privet, honeysuckle and dogwood.