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Goldenrod pedicellate gall. Parasites? - Platygaster

Goldenrod pedicellate gall. Parasites? - Platygaster
Horsham trail. Horsham, Montgomery County, Pennsylvania, USA
September 14, 2009
Size: 1 mm. Cluster 3-4 mm
This is the kind of gall: made by the midge Rhopalomyia pedicellata
Similar clusters of parasites in other galls, these are larvae, the others are pupae:

Moved from ID Request.

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