SPHINXES. 161 



its fore wings and the outer margin of the lower wings are olive. 

 The inner third of the npper wings and the inner margin of the lower 

 wings are light gray. The middle of the lower wings is dull carmine, 

 while near the inner angle is a bluish-gray patch having a curved 

 black line over it. The body is greenish-olive. This fine moth is 

 rarely captured by the collector, but it may be reared from its larva, 

 which is not uncommon, and is to be found feeding on the leaves of 

 the poplar and cottonwood in September. It is a large green cater- 

 pilhxr three or four inches long, and on account of the rough, white 

 granulations with which its body is covered, it has the appearance 

 of being sprinkled with dew or frosted. A closely allied insect or a 

 variet}' of tliis same species is rather abundant in the western states 

 and on the Pacific coast of this country. 



