into a Butterfly — mark the change ! We have four beau- 

 tiful wings, where there were none before ; a tubular 

 proboscis in the place of a mouth with jaws and teeth ; 

 six long legs instead of fourteen feet. This process must 

 require, as it should seem, a proportionably artificial 

 apparatus. The hypothesis, which appears to me most 

 probable is, that in the grub, there exists at one and the 

 same time three animals, one within another, all nourished 

 by the same digestion, and by a communicating circulation, 

 but in different stages of maturity. The latest discoveries 

 made by naturalists, seem to favour this supposition. The 

 insect already equipped with wings, is described under the 

 membranes both of the worm and nymph. In some species, 

 the proboscis, the antennce, the limbs and wings of the 

 Butterfly have been observed to be folded up within the 

 body of the Caterpillar, and with such nicety, as to occupy 

 a small space only under the two first rings. This being 

 the outermost animal, which, beside its own jiroper charac- 

 ter, serves as an integument to the other two, being the 

 furthest advanced dies, as we suppose, and drops off fii'st. 

 The second, the pupa or chrysalis, then offei-s itself to 

 observation. This also, in its turn dies; its dead and 

 brittle husk falls to pieces, and makes way for the appear- 

 ance of the Butterfly. Now if this be the case, or indeed 

 whatever explication be adopted, we have a in-ospeetivc 



