Adults are 3 to 4 mm long and flat with reddish brown to dark reddish brown. Mainly the adults and larvae infest rice, wheat, corn, barley, nuts, rice bran, dried vegetables and fruits, yeast, and powdered milk. Females lay from 500 to 1000 eggs. They develop into adults in around 2 months and life span is around 200 days. They have 1 to 2 generations a year in cold places and 3 to 4 times a year in warm places. The adult beetles have strong boring capacity to open holes in food packages and get inside.

Adults are 3 to 4mm long and flat with semi-shiny reddish brown to dark reddish brown. They very closely resemble red flour beetles. Whereas their antennae gradually get wider toward the tip, the last three segments of antennae of red flour beetles are obviously big. Mainly the adults and larvae infest wheat flour, rice molt, rice flour, barley flour, nuts, dried fruits, cotton seeds, powdered milk, and livestock feed. Females lay around 700 eggs. They develop into adults in around 2 months and life span is more than 200 days. They have 1 to 3 generations a year. Both their life-history characteristics and feeding habits are similar to those of the red flour beetle. The confused flour beetle is strongly resilient in dry, low-temperature environments and has a wide habitat range.

Adults are around 3 mm long and roundly cylindrical in shape with dark brown to blackish brown. Mainly the adults and larvae infest rice, wheat, barley, corn and other grains, as well as grain flours, beans, and cassava. The infested grains become full of holes, and end up as powder. Females lay from 200 to 400 eggs. They develop into adults in around 45 days. They have 2 to 3 generations a year.

Adults are around 3 mm long, have a narrow and flat body with reddish brown without much shine. Mainly the adults and larvae infest rice, wheat, barley, corn, sorghum, and various other grains and dried processed foods. Females lay from 100 to 300 eggs. They develop into adults in around 45 days and life span is around 6 to 10 months, or in some cases as long as 2 years. They have 3 to 4 generations a year.

Adults are around 1.7 to 3 mm long and an oval shape with dark brown to blackish brown. Mainly the larvae infest wheat, barley, corn, rice, and other grains, as well as oilseeds and cocoa. Females lay around 35 eggs. They live for only 3 to 12 days. Reportedly originating in India, they are distributed in hot, dry regions.

Adults are quite small at just 1.5 to 2 mm long and extremely flat with distinctive long antennae. They are reddish brown to brown. Mainly the adults and larvae infest grains and processed foods, oilseeds, dried vegetables, nuts, cocoa, copra (dried coconut), and cassava. Females lay around 200 eggs. Larvae grow inside grains. They develop into adults in 45 to 60 days and life span is around 2 to 4 months. They have 2 to 5 generations a year.

Adults are 4 to 5 mm long including their distinctive elephant trunk-shaped snout. They are brown right after emerging from their cocoon and turn blackish eventually. The adults and larvae infest mainly rice, corn, wheat, barley, as well as dried noodles and rice cakes. Females lay around 200 eggs. Larvae grow inside grains. They develop into adults in 45 to 60 days and life span is around 2 to 4 months. They have 2 to 5 generations a year.