Ollachea

{{short description|Genus of flies}}

{{Automatic taxobox

| taxon = Ollachea

| authority = Townsend, 1919{{cite journal |last1=Townsend |first1=C.H.T. |title=New genera and species of muscoid flies |journal=Proceedings of the United States National Museum |date=1919 |volume=56 |issue=2301 |pages=541–592 |doi=10.5479/si.00963801.2301.541 |url=https://www.biodiversitylibrary.org/page/7766626#page/637/mode/1up |access-date=5 March 2022}}

| type_species = Ollachea elongata

| type_species_authority = Townsend, 1919

| display_parents= 2

| synonyms =

}}

Ollachea is a genus of parasitic flies in the family Tachinidae.{{cite web |last1=O’Hara |first1=James E. |last2=Shannon |first2=J. Henderson |last3=D. Monty |first3=Wood |title=World Checklist of the Tachinidae |url=http://www.nadsdiptera.org/Tach/WorldTachs/Checklist/Tachchlist_ver2.1.pdf |website=Tachinidae Resources |access-date=28 February 2022 |date=5 March 2020}}