50 
PAPERS OX INSECTS AFFECTING VEGETABLES. 
DESCRIPTION. 
The moth. — The moth of this species is quite unlike any common 
form which inhabits the North Atlantic region, being much paler in 
color. The forewings are gray, with a pinkish tinge in fresh speci- 
mens. There is a submedian dark spot and a row of spots in the 
form of a curve in the outer third of the wing. The markings are 
well illustrated in figure 8 (above). It will be noted that the hind- 
wings, which are silvery whitish and are more or less tinged on the 
outer edges with gray, are considerably shorter. The thorax is of 
about the same color as the fore wings and nearly uniform through- 
out. The anterior portion of the abdomen is white and the posterior 
portion, sometimes a little more than half, is gray. The lower sur- 
face is pale, with the fore wings more or less suffused anteriorly 
with fuscous. The posterior legs are distinctly tessellated. The 
abdomen is rather more robust than in many related forms, being 
narrower in the male. 
The wing expanse is 
1J inches and the 
length of the body is 
about five-eighths of 
an inch. 
The eggs and ear- 
lier stages of the 
larva have not been 
studied to the writer's 
knowledge. 
The larva . — The 
larva is subject to 
considerable variation, which may be dependent on the soil. Speci- 
mens received from North Carolina, in a very sandy soil, are pale, 
with a decidedly pinkish tinge. The arrangement of the tubercles 
is shown in figure 8, as is also the form of the thoracic plate. The 
larva, when alive and when fully matured, measures about 1§ indies, 
but the inflated specimens run as high as 2 inches in length. 
No specimens of the pupa have been preserved for description. 
Fig. 8. — Porosagrotis vetusta: Moth and larva. 
DISTRIBUTION. 
All of the specimens of this species in the United States Xational 
Museum are from New York State, and are labeled as follows : 
Albany, Long Island, Carver. Rochester, and Franklin County, 
N. Y. 
There are also specimens of what appear to be races of this species, 
one of them being labeled Porosagrotis satiens, from Coleville, 
Wash., Glenwood Springs, Colo., and from Arizona, and a second 
