In cockroach, three pairs of legs are present - one pair for each segment of thorax. Each leg is composed up of 5 different segments. Coxa is the broadest segment of the leg. Trochanter is the small segment of the leg. Femur is the long segment of the leg. Tibia is the longest segment of the leg of cockroach. Tarsus is made of smaller five segments called tarsomeres, out of which the last tarsomere is known as pretarsus. Each pretarsus bear claws and arolium or pulvillus.