Insect and Spider Identification: CLOSED: Aphids, maybe? Observed in Southern Texas, 1 by bugmaster

bugmaster wrote:
I was on a Biology field studies trip and observed these at Welder Wildlife Refuge in Stinton, TX (Southern Texas).

My Biology instructor couldn't figure out what these things were, so I've become curious and would like to know. This picture was taken on the eleventh of May.

i've uploaded a picture which has a closeup of a larger specimen and a front of a digital camera in the other for size comparison.

Thanks for looking!