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Centre for Biodiversity Genomics. CBG Photography Group. Year: 2013.   cc-by-nc-sa-3.0

Olcella trigramma is a species of flies in the family grass flies. They visit flowers of American Cow-Parsnip, Canadian honewort, and stiff cowbane. They are diurnal.

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EOL has data for 8 attributes, including:

Known occurrences, collected specimens and observations of Olcella trigramma (Loew 1863). View this species on GBIF