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William Hull   cc-by-nc-4.0

Systropus macer is a species of flies in the family bee flies. They visit flowers of roughleaf coneflower, Canadian Horseweed, and Suisun Marsh aster. They are diurnal.

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EOL has data for 8 attributes, including:

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