268 



ANIMAL STUDIES 



the grasshopper is no longer in a larval or immature condi- 

 tion, but is full grown and adult. 



For example of complete metamorphosis among insects 

 we may choose a butterfly, the large red-brown butterfly 



FIG. 147. Metamorphosis of monarch butterfly ( Anosia plexippus). a, egg ; b, larva ; 

 c, pupa ; d, imago or adult. 



common in the United States and called the monarch or 

 milkweed butterfly (Anosia plexippus). The eggs (Fig. 

 147, a) of this butterfly are laid on the leaves of various kinds 

 of milkweed (Asclepias). The larval butterfly or butterfly 

 larva or caterpillar (as the first young stage of the butter- 



