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Photo#437867
Aphid - Drepanaphis

Aphid - Drepanaphis
Cross Plains, Dane County, Wisconsin, USA
June 24, 2010
Size: just under 2mm - body

Moved
Moved from Calaphidinae.

Drepanaphis
Those look like vasiform siphunculi to me, plus the enlarged femora and extremely long antennae with the PT several times the base suggest Drepanaphis as well.

Here is an example that looks very much like this specimen:

http://bugguide.net/node/view/517076/bgimage

Host plant...
...(from your second photo) is Common Buckthorn (Rhamnus cathartica, Rhamnaceae), a widespread, introduced and invasive forest shrub.

Moved
Moved from Aphids.

ID
Calaphidinae

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