NERVOUS SYSTEM OF INSECTS. 



547 



example we may take the nervous system of the 

 Sphinx ligustri, of which representations are 

 given in the larva, pupa, and imago states, 

 wholly detached from the body, and of their 

 natural size, in Figures 442, 443, and 444.* 



444 



4i3 



442 



* These figures were drawn by Mr. Newport, from original 

 preparations made by himself. The same numbers in each refer 

 to the same parts ; so that by comparing the figures with one 

 another, a judgment may be formed of the changes of size and 

 situation which occur in the progress of the principal transfor- 

 mations of the insect. Numbers 1 to 11 indicate the series of 

 ganglia which are situated along the under side of the body, and 

 beneath the alimentary canal. Of these the first five are the 

 thoracic, and the last six the abdominal ganglia ; while the ce- 



