On Feb 2, 2008, DiOhio from Corning, OH (Zone 6a) wrote:
These mites are easily recognized by their red coloring and velvety hair. Adults eat insect eggs, and larvae, known as red bugs, are parasites of insects, spiders, daddy-long-legs, and scorpions. Many are found in moist woods, others in deserts.
Velvet mite eggs are scattered on soil. Larvae find a host and begin to feed. Nymphs and adults are predacious.
These mites help keep the insect population in check, which makes them beneficial.