Psyllidae
Until shortly, all Psylloidea were considered as one one family, Psyllidae, but currently the Triozidae, and severel much smaller families, are positioned separately.
All stages, but especially the larvae, produce honeydew and wax (as threads or wool), often copiously, and sometimes as a mix.
references
Ammar, Alessandro, Shatters-jr & Hall (2013a), Burckhardt 2002a, psyllids.org, psyllids of economic importance, Psyl’list.
04/12/2014