300 



INSECT TRANSFORMATIONS. 



vouring. This is, in fact, the nearest analogy which 

 occurs to us among the other classes of animals ; 

 for the pupa, though it does not chew the cud like 

 the ox, assuredly rests for the purpose of digesting or 

 (if the term be preferred) of assimilating the cruder 

 fluid stored up by the caterpillar, and forming or 

 perfecting therefrom the organs and members of the 

 mature insect.* 



Some pupse have a slight motion, particularly of 

 the lower parts of the body, and a few others differ 

 little from the perfect insect, continuing to move and 

 feed ; but the greater number remain apparently mo- 

 tionless. That they have internal though impercep- 

 tible motions, however, is proved by their possessing 

 similar organs of respiration with caterpillars and 

 perfect insects. We have adverted, in a former page, 

 to the eighteen spiracles which communicate with the 

 double windpipe of caterpillars, and the same appara- 

 tus is always found in chrysalides, situated on the 

 sides of the abdominal rings. This we think might 

 have convinced such distinguished observers as Lyon- 

 net and Muschenbruk, that the most quiescent pupse 

 could not exist without breathing. 



a, Clifj'salis of Gi-nepteryx Rhamni. h, pupa of Lariafns clina. 

 c, pupa of Sphin.v ligustri. 



* J R. 



