SPHINXES. 



151 



interesting from its protective mimicry, is tlie larva of Cerafomia 

 quadricornk. This larva is green, of the exact tint of the nnderside 

 of the elm leaf, and along its sides are a number of obliqne light 



Larva of Ceratomia quadricornis. 



lines. A line down its back is serrated, and on the forward part of 

 the body are four soft green horns, also serrated. While this insect 



Ceratomia quadricoruis. 



is at rest clinmno- to the midrib on the underside of the elm leaf it 



o o 



is a difficult creature to see, and one may gaze directl}' on it and still 

 think he is looking at a slightly curled leaf. The light line down 



