Coleophora trifolii

{{short description|Species of moth}}

{{Speciesbox

| image = 37.033 BF516 Coleophora trifolii F (5838951405).jpg

| image_caption =

| taxon = Coleophora trifolii

| authority = (Curtis, 1832){{cite web |title=Coleophora trifolii (Curtis, 1832) |url=https://fauna-eu.org/cdm_dataportal/taxon/39b69a8a-797a-4260-860c-e3a75a3046b2 |website=Fauna Europaea |accessdate=24 November 2019}}

| synonyms = {{collapsible list|

• Damophila trifolii Curtis, 1832
• Plutella chalybaella Costa, 1836
• Coleophora melilotella Scott, 1861
• Coleophora frischella aurata Toll, 1960
• Coleophora trifolii aurata Toll, 1960

}}}}

Coleophora trifolii, the trefoil thick-horned tinea or large clover case-bearer, is a moth of the family Coleophoridae. It is found in Europe, North Africa, Asia Minor, Afghanistan and North America.

The wingspan is 15–20 mm. A metallic bronze green Coleophora with pale yellow scales fringing its eyes. Certain identification relies on microscopic examination of the genitalia.Emmet A.M., Langmaid J.R., Bland K.P., Corley M.G.V. & Razowski J, Coleophoridae in A. Maitland Emmet ed., 1996 The Moths and Butterflies of Great Britain and Ireland Volume 3 (Yponomeutidae to Elachistidae)

Adults are on wing from June to July. They are active during the day.{{cite web |last1=Kimber |first1=Ian |title=37.033 BF516 Large Clover Case-bearer Coleophora trifolii (Curtis, 1832) |url=https://ukmoths.org.uk/species/coleophora-trifolii/distribution-map |website=UKMoths |accessdate=24 November 2019}}

The larvae feed from July to September on the seeds of Melilotus species (including Melilotus albus, Melilotus officinalis and Melilotus altissima).{{cite web |last1=Ellis |first1=W N |title=Coleophora trifolii (Curtis, 1832) large clover casebearer on Melilotus |url=https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/lepidoptera/ditrysia/gelechioidea/coleophoridae/coleophora/coleophora-trifolii/ |website=Plant Parasites of Europe |accessdate=24 November 2019}}