Question

Which of the following features is used to identify a male cockroach from a female cockroach ?

• A. Presence of anal cerci
• B. Presence of a boat shaped sternum on the $9^{th}$ abdominal segment
• C. Forewings with darker tegmina
• D. Presence of caudal style

Answer 1

Answer: (D)

Presence of caudal style

Answer 2

Males bear a pair of short, thread like anal styles which are absent in females. Anal/caudal styles arise from $9^{th}$ abdominal segment in male cockroach.