LEPIDOPTERA : TRANSFORMATIONS. 403 



furnished by the Bombyx mori, or common silk-worm ; but 

 it is of a darker colour, and will, it is feared, always present 



Caterpillar, leaf-cocoon, and chrysalis of the Prometheus Moth. 



difficulties in reeling, from the manner in which part of it is 

 attached to the branch. I cannot conclude these observa- 

 tions without congratulating my readers upon that widely- 

 extending spirit of observation into the wonders of the crea- 

 tion, of which Mr. Peale's work exhibits an example, 

 trusting, at the same time, that this beautiful book will meet 

 with that success which it so richly deserves. 



Other interesting instances of the care with which the 

 construction of these cocoons is undertaken, have already 

 been given in preceding pages ; and the general structure of 

 Lepidopterous chrysalides is detailed in p. 207, &c. 



In the earlier editions of the Systema Naturae, Linnaeus 

 adopted only two genera : namely, Papilio for the butter- 

 flies, and Phalcena for the moths. In the last editions, how- 

 ever, he added a third genus, Sphinx, and subdivided these 

 three groups in the following manner : 



