This order of insects is divided into the Spiders, the Scorpions, the Harvestmen and the Mites (Acarina).
"Our Common Insects" by Alpheus Spring Packard
A treatise on the Acarina, or mites.
"Handbook of Medical Entomology" by William Albert Riley
The chigger mites of Kansas (Acarina, Trombiculidae).
"Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz" by John M. Legler