Billaea adelpha

{{short description|Species of fly}}

{{Speciesbox

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| genus = Billaea

| species = adelpha

| authority = (Loew, 1873){{cite journal |last1=Loew |first1=H. |title=Diptera nova, in Pannonia inferiori et in confinibus Daciae regionibus a Ferd. Kowarzio capta |journal=Berliner Entomologische Zeitschrift |date=1873 |volume=17 |pages=33–52 |url=https://www.biodiversitylibrary.org/page/8341111#page/39/mode/1up |access-date=14 June 2023}}

| synonyms = *Billaea caucasica Kolomiets, 1966{{cite journal |last1=Kolomiets |first1=N.G. |title=Parasitic Diptera of subfam. Dexiinae (Dipt. Larvaevoridae). Genera Phorostoma and Billaea in the fauna of the USSR |journal=Novye i Maloizvestnye Vidy Fauny Sibiri |date=1966 |volume=1966 |pages=57–104}}

• Billaea mesnili Kolomiets, 1966
• Billaea uralensis Kolomiets, 1966
• Phorostoma adelpha Loew, 1873
• Phorostoma macrophthalma Loew, 1873
• Phorostoma nigrofasciata Portschinsky, 1879{{cite journal |last1=Townsend |first1=C.H.T. |title=Correction of the misuse of the generic name Musca, with description of two new genera |journal=Journal of the Washington Academy of Sciences |date=1915 |volume=5 |pages=433–436 |doi=10.5962/bhl.part.19446 |url=https://www.biodiversitylibrary.org/page/2000773#page/439/mode/1up |access-date=16 December 2023}}

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Billaea adelpha is a species of fly in the family Tachinidae.{{cite web |last1=O’Hara |first1=James E. |last2=Henderson |first2=Shannon J. |first3=D. Monty |last3=Wood |title=Preliminary Checklist of the Tachinidae (Diptera) of the World|url=http://www.nadsdiptera.org/Tach/WorldTachs/Checklist/Tachchlist_ver2.1.pdf |website=Tachinidae Resources |access-date=16 December 2023 |date=5 March 2020}}