aphids - Rhopalosiphum - BugGuide.Net

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Moved from Aphids.

… Natalie Hernandez, 14 March, 2018 - 4:26pm

I'm thinking Rhopalosiphum padi

They have a teeny tiny cauda; the siphunculi are tilted at a ~45° angle at the apex; the base of antennal segment six is fairly short; the m-vein is forked twice, with the second fork close to the wing margin; the legs are banded; and I often collected these in large numbers in September in Wisconsin.

From what I can see in this pic (it is so tough to photograph aphids) your specimens match all these characters.

Some good images for comparison:

http://aphid.aphidnet.org/Rhopalosiphum_padi.php

… Natalie Hernandez, 14 March, 2018 - 10:30am

aphids

Thanks for the info. I'll have to try taking some better photos this year. Just looked through the photos I have from that night and I think I one that shows the wing pattern.

… Ilona L., 14 March, 2018 - 2:44pm

Good pic.

Definitely Rhopalosiphum, and I still feel pretty confident about R. padi, that dorsal shot really shows the tiny cauda and shape of the siphunculi. I'm only a little hesitant to say definitely padi, because oxyacanthae looks very similar and is widespread as well.

… Natalie Hernandez, 14 March, 2018 - 3:26pm