The confused flour beetle apparently got its common name because of the confusion regarding its identity. It is one of the most important pests of stored products found in the home and in grocery stores. Although of African origin it now occurs worldwide in cooler climates. In the United States it is more abundant in the northern states.
Adults about 1/8" (3-4mm) long. Color reddish brown. Antennae gradually clublike club 4 segmented. Sides of thorax almost straight at least much more so that curved sides of red flour beetle. Adults with wings but never observed flying.
These beetles are unable to feed on whole kernels or undamaged grain. They have been recorded attacking grains and grain products peas beans shelled nuts dried fruits spices milk chocolate drugs snuff cayenne pepper and herbarium insect and other museum specimens. They have been found to infest poisoned baits.