Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Nectaring on Heracleum - Gasteruption - female

Nectaring on Heracleum - Gasteruption - Female
Harms Woods Forest Preserve, Glenview, Cook County, Illinois, USA
June 15, 2006
Size: ~11mm
They seem to be licking the base of the stigma. We're assuming this is a female, with the ovipositor.

Moved from Gasteruption.
Please see Dave Smith's remarks for a more detailed explanation of these two similar species.