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EENY289: Confused Flour Beetle, Tribolium confusum Jacquelin du Val (Insecta: Coleoptera: Tenebrionidae) and Red Flour Beetle, Tribolium castaneum (Herbst) (Insecta: Coleoptera: Tenebrionidae)

Figure 5. Comparison of adults of the red flour beetle (left), Tribolium castaneum (Herbst) and the confused flour beetle (right), Tribolium confusum (duVal). The antenna of the red flour beetle ends in a 3-segmented club and the sides of the thorax are slightly curved. The confused flour beetle has no apparent club on the antennae and the sides of the thorax are straighter. Graphics by: USDA