No Taxon - Debris-Carrying Larvae (Green Lacewing).
Size: approx. 5-10 mm. Photo: 08/09/11, 9 am.

Hard to believe but this little cotton ball is a debris-carrying larva of a Green Lacewing (which has 14 different genera). Apparently the trash carried by these larvae is a protection against predatory lady beetles. My best guess is that the white material is the stuff left behind by immature leaf and/or plant hoppers. 


A short video is available on my YouTube channel.
bug guide: