two experiments were carried out to study mite infestation in stored grains. The first experiment was conducted to survey the mite species associated with imported wheat stored in metal silos at two cities (Tanta and Kafr El-Sheikh) in middle and north Delta of Egypt. The second experiment was conducted to study the relationship between mite infestations and chemical properties of six stored grains. Three mite groups were recorded on stored imported wheat , grain feeders, predacious and fungivorous. The recorded mites in Tanta silos were five species belonging to three families on American wheat and nine species representing six families on Russian wheat, while mites that recorded on American and Russian wheat in Kafr El-Sheikh silos were six species belonging to four families and eight species representing six families, respectively. The most dominant species recorded on American and Russian wheat were Tyrophagus putrescentiae Sch., Cheyletus malaccensis Oud. However, Cheyletus eruditus Sch. was the least one of the two tested imported wheat. Results of the proximate chemical composition obtained from tested legumes (crushed faba bean, cowpea and lentil), and cereal grains (wheat, maize and rough rice) showed that carbohydrates were the most dominant group of constituents, followed by protein. Moisture content came third in this category, while ash occupied the fourth rank and lipid was the minor group of constituents. A positive correlation was recorded between mite grain feeders and fungivorous and each of carbohydrates (r=0.279) and lipids (0.713). On the other hand, there werenegatively correlations with total proteins (r=-0.543) and ash (r=- 0.255). The effect of moisture of tested grains and total recorded mites was varied.