48

N. Chari et al.

Fig. 4.7 Illustrating the indirect muscle action in an insect

Fig. 4.8 Transverse section of thorax—housefly (Illustrative)

8.

Folding of the wing is produced by a muscle arising on pleuron and inserted

into the third axillary sclerite of the wing; interestingly, the activity of the same

muscle in insect flight affects the power output of the wing. Thus, it is also

important in flight control.