Cacyreus darius

{{Short description|Species of butterfly}}

{{Speciesbox

|image = Cacyreus darius male.jpg

|image2 = Cacyreus darius.jpg

|image2_caption = males and female

| taxon = Cacyreus darius

| authority = (Mabille, 1877)[http://www.nic.funet.fi/pub/sci/bio/life/insecta/lepidoptera/ditrysia/papilionoidea/lycaenidae/polyommatinae/cacyreus/index.html Cacyreus] at Markku Savela's website on Lepidoptera

| synonyms =

• Lycaena darius Mabille, 1877

}}

Cacyreus darius is a butterfly in the family Lycaenidae. It is found on Madagascar, Mauritius, Réunion and the Comoros.{{Cite web |url=http://atbutterflies.com/downloads/lycaenidae_polyommatini_1.doc |title=Afrotropical Butterflies: Lycaenidae - Tribe Polyommatini (part 1) |access-date=2012-07-09 |archive-url=https://web.archive.org/web/20131213021126/http://atbutterflies.com/downloads/lycaenidae_polyommatini_1.doc |archive-date=2013-12-13 |url-status=dead }} The habitat consists of forests, forest margins and anthropogenic environments.

Known food plants of this species are Coleus species and Hyptis pectina (Lamiaceae)Martiré & Rochat, 2009. Les Papillons de la Réunion & leurs chenilles, page 182.