Myscelia ethusa

{{Short description|Species of butterfly}}

{{Redirect|Blue wing|the fishery patrol vessel|USFS Blue Wing}}

{{Speciesbox

| status = G5

| status_system = TNC

| status_ref = {{cite web |url=http://explorer.natureserve.org/servlet/NatureServe?sourceTemplate=tabular_report.wmt&loadTemplate=species_RptComprehensive.wmt&selectedReport=RptComprehensive.wmt&summaryView=tabular_report.wmt&elKey=113692&paging=home&save=true&startIndex=1&nextStartIndex=1&reset=false&offPageSelectedElKey=113692&offPageSelectedElType=species&offPageYesNo=true&post_processes=&radiobutton=radiobutton&selectedIndexes=113692 |title=Myscelia ethusa - (Doyère, (1840) Mexican Bluewing |work=NatureServe Explorer |publisher=NatureServe |accessdate=2010-08-17}}

| image = Mexican Bluewing (Myscelia ethusa), underside.jpg

| image_caption = Underside

| image2 = Myscelia ethusa.jpg

| image2_caption = Topside

| taxon = Myscelia ethusa

| authority = (Doyère, [1840])

| synonyms =

• Cybdelis ethusa Doyère, [1840]
• Myscelia rogenhoferi R. Felder, 1869
• Myscelia cyanecula C. Felder & R. Felder, [1867]
• Myscelia pattenia Butler & H. Druce, 1872

}}

Myscelia ethusa, the Mexican bluewing or blue wing, is a butterfly of the family Nymphalidae. The species was first described by Louis Michel François Doyère in 1840. It is found from Colombia north through Central America to Mexico. Strays can be found up to the lower Rio Grande Valley of Texas in the United States.

The wingspan is {{convert|64|-|76|mm|in|abbr=on}}. Many generations occur per year.

The larvae feed on the Dalechampia species. Adults feed on rotting fruit.{{cite web |url=http://www.butterfliesandmoths.org/species?l=1795 |title=Mexican Bluewing Myscelia ethusa (Doyère, (1840)) |publisher=Butterflies and Moths of North America |accessdate=2010-08-17 |url-status=dead |archiveurl=https://web.archive.org/web/20100620092129/http://butterfliesandmoths.org/species?l=1795 |archivedate=2010-06-20 }}