THE MUSCLES ; THE FAT-BODY AND CCELOM. 



77 



Add. of coxa 



. Abd. of coxa 



Ext. fern. 



-- Fl. fern. 



FL tib. 



Ext. tib. 



_ _ _. Fl. tars. 



Retr. tars. 



Fig. 37. Muscles of left mesothoracic leg, seen from behind. The muscles are- 

 Adductor and abductor of the coxa ; extensor and flexor of femoral joint ; flexor 

 and extensor of tibial joint; flexor of tarsus; and a retractor tarsi, which swings 

 the tarsus backwards, so that it points away from the head. It is opposed by 

 another muscle, which moves the tarsus forwards. Both muscles parallelise the 

 tarsus to the axis of the body, but in opposite directions. 



