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Chelsea Gottfried   cc-by-nc-4.0

Ectemnius arcuatus is a species of Hymenoptera in the family crabronid wasps. They visit flowers of hemlock and white meadowsweet. They are diurnal.

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EOL has data for 15 attributes, including:

Known occurrences, collected specimens and observations of Ectemnius arcuatus (Say 1837). View this species on GBIF