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What Kind of Larva - Pristiphora rufipes

What Kind of Larva - Pristiphora rufipes
Springfield, Calhoun County, Michigan, USA
May 10, 2009
These larva? were found eating up the leaves on columbine. The larva showed up about 2 weeks after these wasp critters were seen hanging around the columbine. Any connection? Are the green round things on larva feces or some type of paratization? I'm wondering because of the last 2 photos with the green "things" and dead larva.

Moved from Unidentified Sawfly Larvae.

Thank you, Dave.

Pristiphora aquilegiae (Vollenhoven)
An introduced species that feeds on columbine. Adult matches adults of this species.

Moved from Frass. Keeping this one picture because it is connected to sawfly photos.

Moved from ID Request.

There is a connection
I think that they are sawfly (type of wasp) larvae, and they become the black wasp that you posted. The green round things are feces, and it is hard for me to tell, but the last image may be a molted skin, rather than a dead larva.

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