This image depicts a dorsal view of an adult, Cimex lectularius bed bug. Adult bed bugs are on average 5mm long, oval-shaped and dorsoventrally flattened. Like other members of the order, Hemiptera, they possess piercing-sucking mouthparts. Adults are brachypterous, which means that their hindwings are nearly absent, while their forewings are reduced to small, leathery pads. As you can see in PHIL 12703, nymphs look like smaller, paler versions of their adult counterparts.