36 
sapwood during the summer and fall. It is quiescent during the 
winter, but resumes feeding in the early spring, reaching full growth 
by May or June. The caterpillar is then a little over 1 inch in 
length, soft, and pale yellowish in color, with a shining, dark-brown 
head. It transforms to a chrysalis within an elongate cocoon just 
beneath or sometimes outside of the bark. The moths emerge in May 
DRS epee C Sap 
Fic. 30.—Sanninoidea exitiosa: a, female; b, male; c, larva; d, e, female and male pup; f, cocoon. 
(Marlatt. ) 
or June. The female has dark-blue fore-wings; the male has clear 
ones. It primarily attacks peach, but sometimes cherry and plum. 
There is but one brood each year. 
THE PEACH TWIG-BORER. 
(Anarsia lineatella Zell.—fig 31.) 
to} 
The presence of this insect in the winter is quite readily known by 
bits of frass attached to the bark, often at the crotches of branches or 
twigs. Each bit of frass covers 
the entrance to a small burrow 
lined with silk, within which the 
young larva of this insect passes 
the winter. It is now of a yellow- 
ish color, with the head and thoracic 
segments, as well as the last seg- 
ment, almost black. Early in 
spring, when the leaves are coming 
out, the larvee abandon their bur- 
rows and attack the tender leaf 
Fic. 31—Anarsia lineatella: a, infested twig; shoots, boring into them from a 
b, same enlarged; ¢c, larva in case, d, larva en- . . 
larged. (Marlatt.) point a little below the apex, and 
when one shoot commences to dry 
the larva leaves it and attacks another. In about two weeks the larva 
is full grown, and pupates in a slight open cocoon attached to the 
bark or among the shriveled leaves. The tiny, grayish moth issues 
in May. Two broods follow this, the larve boring in the young twigs 
