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Photo#1093544
On tulip poplar - Illinoia liriodendri

On tulip poplar - Illinoia liriodendri
Briar Bush Nature Center, Montgomery County, Pennsylvania, USA
June 29, 2015
Size: 2 mm.
I know there are over 800 unidentified aphids, but perhaps knowing the host plant, tulip poplar may narrow it down. Could it be Illinoia liriodendri (Tuliptree Aphid)?

Most leaves had just a handful of aphids on the underside.
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On tulip poplar - Illinoia liriodendri On tulip poplar - Illinoia liriodendri

Moved
Moved from Aphids.

Not many aphids feed on Liriodendron tulipifera so this species is pretty distinct for that host. Those long siphunculi a little swollen at the end, and the tibiae are dark, plus they're often yellowish and sometimes a little waxy.

Liriodendron tulipifera

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