Tagiades tethys

{{Short description|Species of butterfly}}

{{Speciesbox

| image = Daimio_tethys_1.jpg

| taxon = Tagiades tethys

| authority = (Ménétries, 1857)

| synonyms =

• Pyrgus tethys Ménétries, 1857
• Daimio lineata Mabille & Boullet, 1916
• Daimio_tethys (Ménétries, 1857)

}}

Tagiades tethys is a species of butterfly of the family Hesperiidae. It is found in eastern Asia, including the Amur region, southern Ussuri, Japan, Taiwan and Korea. The wingspan is about {{convert|40|mm}}. The larvae feed on various plants, including Quercus mongolica, Dioscorea nipponica, Dioscorea butatas, Dioscorea japonica and Dioscorea japonica var. pseudojaponica.