Locastra ardua

{{Short description|Species of moth}}

{{Taxobox

| image =

| image_caption =

| regnum = Animalia

| phylum = Arthropoda

| classis = Insecta

| ordo = Lepidoptera

| familia = Pyralidae

| genus = Locastra{{cite web |last=Nuss |first=M. |display-authors=etal |date=2003–2020 |url=http://globiz.pyraloidea.org/Pages/Reports/TaxonReport.aspx |title=GlobIZ search |website=Global Information System on Pyraloidea |accessdate=April 9, 2020}}

| species = L. ardua

| binomial = Locastra ardua

| binomial_authority = C. Swinhoe, 1902

| synonyms = *Locastra drucei Bethune-Baker, 1905

}}

Locastra ardua is a species of snout moth in the genus Locastra. It was described by Charles Swinhoe in 1902, and is known from Fiji, including Nausori.