The flour mite, Acarus siro, a pest of stored grains, is one of many species of grain and flour mites. An older name for the species is Tyroglyphus farinae. The flour mite, which is pale greyish white in colour with pink legs, is the most common species of mite in foodstuffs. The males are from 0.33–0.43 millimetres (0.013–0.017 in) long and the female is from 0.36–0.66 mm (0.014–0.026 in) long. Flour mites are intentionally inoculated into Mimolette cheese to improve the flavor. When used for this purpose, they may be referred to as "cheese mites".