Beside insects mites (Acarina) occur as pests in grain and particularly in flour.    From Wordnik.com.  [7. Important pests in storage] Reference

Therefore it was the large blood-sucking mite of the Acarina order which was eponymous, not her tide.    From Wordnik.com.  [Piranha to Scurfy & Other Stories]

The Arctic has about 300 species of spiders (Arachnida), 700 species of mites (Acarina), 400 species of springtails (Collembola), 500 species of nematodes, 70 species of oligochaetes (of which most are Enchytraeidae), only a few mollusks, and an unknown number of protozoan species.    From Wordnik.com.  [Implications of current species distributions for future biotic change in the Arctic] Reference

Along with the tick, they make up the order Acarina.    From Wordnik.com. Reference

Agistemus floridanus (Acarina - Stigmaeidae) predatory mite, Florida citrus.    From Wordnik.com.  [xml's Blinklist.com] Reference

This order of insects is divided into the Spiders, the Scorpions, the Harvestmen and the Mites (Acarina).    From Wordnik.com.  [Our Common Insects A Popular Account of the Insects of Our Fields, Forests, Gardens and Houses] Reference