Mites
Acari: Mites, Chiggers, Chiggers, Dust Mites: A Primer, House Dust Mites, Itchy Chiggers, Mite Image Gallery, Mites - Olfaction, Electrophysiology, Neurobiology, Mites Medically Important to Humans, Scrub Itch Mite or Chigger
Ticks
Classification of Ticks, Common Tick Species In New Jersey, Identification of Ticks in Australia, Information on Ticks, Iowa Insect Notes: American Dog Tick, Iowa State Entomology - Ticks, Lyme Disease and Tick Management, Rhipicephalus sanguineus, Tick Biology, Tick Bites
Acari: The Mites
Characteristics, taxonomy, and phylogenetic relationships of the Acari, including mites and ticks. By David Evans Walter, Jerry Krantz, and Evert Lindquist, from The Tree of Life project.