Centre for Biodiversity Genomics. CNC/BIO Photography Group. Year: 2011.   cc-by-nc-sa-3.0

Pterallastes thoracicus is a species of flies in the family Syrphidae. They visit flowers of white snakeroot, downy yellow false foxglove, smooth violet prairie aster, and American Cow-Parsnip. They are diurnal. Individuals can grow to 12.5 mm.

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EOL has data for 7 attributes, including:

Known occurrences, collected specimens and observations of Pterallastes thoracicus Loew 1863. View this species on GBIF