THE INTERNAL ANATOMY OF INSECTS 



105 



Fig. 122. — Internal anatomy of a caterpillar, Cossus ligniperda; i, principal 

 longitudinal trachas; 2, central nervous system; j, aorta; 4, longitudinal 

 dorsal muscles; 5, longtiudinal ventral muscles; 6, wings of the heart; 7, 

 tracheal trunks arising near the spiracles; 8, reproductive organs; 9, vertical 

 muscles; 10, last abdominal ganglion (From Lyonet). 



