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aphid - Illinoia liriodendri

aphid - Illinoia liriodendri
Rockville, Rock Creek Stream Valley Park, Montgomery County, Maryland, USA
June 12, 2020
Size: 3 mm?
On shaded bridge over stream in deciduous forest bordering field. There were several of these on the bridge railing. Almost all were white; a few light pink.

Images of this individual: tag all
aphid - Illinoia liriodendri aphid - Illinoia liriodendri

Moved from Aphids.

Maybe Macrosiphum
Some of them can be waxy like this and also have green and pink forms. I think I see a constriction at the tip of the siphunculi which would support that, but its hard to see. This also looks like a nymph, which don't have a lot of the characters used for ID, because keys and descriptions are based on adults who have more developed siphunculi, caudas, antennae, etc.

Thanks. I have added a photo of what I believe is an adult from the same group. If that is not enough I will try to get some better photos.

Is there a tulip tree nearby?
The adult pic is great, but the siphunculi make me think Illinoia, and a common one is Illinoia liriodendri.

Yes, there are a number of tulip trees in the area – after a storm the blossoms and leaves litter the path.

Then I am pretty sure that’s what they are. I don’t know of this species having a pink form, but Macrosiphum euphorbiae does, and has also been recorded on Tulip tree.

Great! Thanks. I'll see if I can get a shot of the pink ones.

Moved from ID Request.

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