36 THE SKIN OF INSECTS. 



those of the caterpillar of the goat moth, traced with 

 incredible skill, patience, and accuracy by M. Lyon- 

 net, to whom I am indebted for this figure. 



Muscles of the caterpillar of the goat moth ( Cossus ligni- 

 perda} ; with the two main air-pipes running along each side, 

 and the heart with its six pairs of pyramidse wings in the 

 middle. 



