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Sphex ichneumoneus (Great Golden Digger Wasp) is a species of Hymenoptera in the family sphecid wasps. They visit flowers of Suisun Marsh aster, Ruth's milkweed, Humiria, and Eryngium pendletonensis. They are diurnal. Individuals can grow to 24 mm.

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EOL has data for 8 attributes, including:

Known occurrences, collected specimens and observations of Great Golden Digger Wasp. View this species on GBIF