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Photo#348514
Infestation on Asclepias syriaca - Myzocallis asclepiadis

Infestation on Asclepias syriaca - Myzocallis asclepiadis
Schuylkill Nature Center, Philadelphia County, Pennsylvania, USA
November 1, 2009
Size: Almost 2 mm
They were on the underside of Asclepias syriaca leaves side by side with clusters of Aphis nerii. The larger ones have a darker pattern than earlier instars. I also found a few winged adults.
I wonder if these creatures have wingless and winged generations. This one doesn't seem to have wing stubs; some of the earlier instars clearly do.

Update: They are not psyllids but aphids, after all. I couldn't see the cornicles, that is why I made that mistake. I don't even know whether it is adult or immature.

Images of this individual: tag all
Infestation on Asclepias syriaca - Myzocallis asclepiadis Infestation on Asclepias syriaca - Myzocallis asclepiadis Infestation on Asclepias syriaca - Myzocallis asclepiadis - female Infestation on Asclepias syriaca - Myzocallis asclepiadis Infestation on Asclepias syriaca - Myzocallis asclepiadis Infestation on Asclepias syriaca - Myzocallis asclepiadis

Comment by Anurag Agrawal
"I do believe this is Myzocallis asclepiadis… we often find morphs that look like this in September (but not earlier)… our interpretation is that this is the overwintering morph… when we have brought them into the laboratory, they do not reproduce, again suggesting that they are going into diapause.

I also find the pinkish-orange-ish spotted immatures during the summer and don’t have a sense for what that is about… certainly a lot of variation in this species!"

Moved
Moved from ID Request.

Sorry
I didn't read your comment about this being a psyllid, and I made a comment about a somewhat similar aphid which I thought might be a relative. (Wings are close)
http://www.aphidweb.com/Aphids%20of%20Karnataka/Therioaphistrifolii.htm

 
I don't know
I can't see any cornicles but maybe they are aphids anyway. The images you link to are very similar to mine.
Anyway, a Syrphid larva was going through them and the Aphis nerii with glee. Not a choosy maggot.

 
Cornicles...
I can see them, though they are very short at the last abdominal segment in your image. I've seen other species of aphids like this.

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