The Origin of the Markings of Caterpillars. 269 



is not familiar with the fact that beneath the green 

 needles there is also much yellow to be found ? " 



This adaptation to the needles and twigs 

 obviously explains why this caterpillar in the adult 

 condition is so far removed from those of the 

 genus Sphinx, while the moths are so nearly 

 related that they were only separated as a distinct 

 genus when we became acquainted with a large 

 number of species. 



