SPHINXES. 161 
its fore wings and the outer margin of the lower wings are olive. 
The inner third of the upper 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 isa 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- 
pillar three or four inches long, and on account of the rough, white 
eranulations with which its body is covered, it has the appearance 
of being sprinkled with dew or frosted. A closely allied insect or a 
variety of this same species is rather abundant in the western states 
and on the Pacific coast of this country. 
