8 INJURIOUS AND USEFUL INSECTS 



above the neck; the mid thoracic segment, or mesothorax, 

 carries the wing-covers, which in the male cockroach reach 



Fig. 5. — The three thoracic legs of a female cockroach. I. s, 

 sternum; cjr, coxa; /r, trochanter ; y?, femur; ^^j tibia; /a, 

 tarsus. In IIlA the coxa is abducted, and the joints a (epi- 

 sternum) and l> slightly separated. 



to the fifth abdominal segment; they are vestigial in the 

 female. The hind thoracic segment, or xnetathorax, bears a 



