ADAPTATIONS IX ANIMALS AND PLANTS 



57 



The Troiliis Butterfly {Papilio troilus) visiting the Cardinal 

 Flower {Lobelia cardinalis). This butterfly, along with the 

 ruby-throated humming-bird, aids in the cross-fertili- 

 zation of this flower. It mimics the butterfly 

 Pharmacophagus (Papilio) philenor on both 

 upper and lower wing-surfaces. See 

 colored frontispiece. 



