252 Report OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
their case but the veins and silken threads they abandon their 
case, crawling to some more removed spot, all the time moving 
hither and thither as if using some sense of discrimination till a 
suitable leaf is found. At other times they drop down with a 
web to leaves below; they may crawl to the end of a twig and 
eat into the terminal part; while in some instances, having eaten 
the greater part of the leaf, they will commence to work on the 
stem of the leaf, which in some cases they have severed, thus 
either precipitating themselves to the earth together with the 
leaf, whereon they commence to crawl for that or another tree; 
or, falling upon a branch below they then pass to other leaves. 
“ Larvee at different parts of the day are to be found either 
outside of their cases, on the same or opposite side of the leaf, 
or just projecting out their heads from one side or the other - 
of their cases within a short radius. The adults of these larvxe 
were kindly identified by Dr. C. H. Fernald.” 
The full grown larva measures about one-half inch in length. 
It is slender and tapering in shape. The color of the body varies 
from a flesh color to a sulphur-yellow tinged with green, or 
more decided greenish tints. The head and shield vary from 
light yellowish brown to dark brown. The legs and prolegs are 
yellowish to yellowish brown. The most prominent markings of 
the body are three broad dark lines extending the full length 
of the dorsum. The middle line may be divided longitudinally 
into two finer ones. This line is usually lighter than the others. 
The body is sparsely covered with fine hairs which arise from 
small black dots. 
The pupa.—When about to pupate the larva attaches itself 
usually to a leaf, but not infrequently to the fruit or twig. (Plate 
XXVI, Fig. 3 enlarged; Fig. 5 shows an injured leaf, natural 
size, with pupe attached.) Most of the pupe found by the writer 
in the orchards were attached to the leaves. They measure about 
one-quarter inch in length and are reddish brown to dark brown in 
color. The pupa stage probably lasts about 8 to 10 days as 
a rule, as a large number of individuals in confinement averaged 
about this number. Slingerland! states that in their cages 
19Cornell Agr. Exp. Sta., Bul. 187, p. 94. 
