This chapter addresses the beetles associated with stored food products. Species associated with stored food products are those with a history of being found in these products. Throughout this book, the term “stored-product” refers principally to stored food products. I specify “food” product only here and in the discussion of those families that also contain wood product pests to emphasize this usage. Beetles are the largest group of stored-product insects.(1) Estimates of the numbers of different kinds of beetles associated with all stored-products (including food, lumber, furniture, textiles and hides) range up to 500–600 species.(2–4) In this vein, Halstead included 40 families in his identification key to the beetles associated with stored-products.(3) More conservatively, only about 100 species of insects, beetles included, are thought to cause contamination or loss of stored food products.(4) On the basis of my experience analyzing food products, I have included 27 beetle families in this chapter as representative of what the microanalytical entomologist can actually and realistically expect to encounter in stored food products. Families that we in the FDA have not encountered in our samples of stored-products or have rarely encountered, or are represented only by field or incidental species, have not been treated. Likewise, within families that are included in this chapter, taxa such as genera and species that have not been encountered by us generally are not treated. In contrast, families that we have repeatedly recorded in our samples but that are not generally acknowledged as being associated with stored-products have been included.