German cockroaches have how many stripes on their thorax?

• A. Two stripes on the thorax
• B. Three stripes on the thorax
• C. Four stripes on the thorax
• D. No stripes

Answer: (A)

German cockroaches are identified by two dark, parallel stripes on the thorax (the pronotum) right behind the head. This two-stripe pattern is the quick visual cue that distinguishes them from other common roaches found in homes. The stripes are a consistent feature in adults, helping pest professionals recognize this species quickly, which matters because different roaches have different habits and control needs. Other species show different markings, such as bands or a pale design on the pronotum, or lack these stripes altogether, so the two closely spaced dark lines are the hallmark feature here.