496 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
sprayed trees, causing the foliage to become brown and shriveled. This 
species is distributed quite generally in eastern Canada and through 
the United States from the Atlantic coast to Texas and the Rocky 
Mountains. The moths emerge in the spring at about the time the 
foliage is expanding. The pale, greenish eggs are deposited on the 
lower sides of the leaves. The habits of the larvae are somewhat 
similar to those of B. canadensisella. 
The full-grown larvae usually construct their cocoons on the lower 
surfaces of twigs, although occasionally some are spun on the fruit and 
foliage. There is one 
generation 1n the North- 
ern States, but farther 
south there are two gen- 
erations annually, the 
moths of the second 
generation emerging 
about the first of Au- 
gust. The winter is 
passed in the pupal 
stage in the small, whit- 
ish, ribbed cocoons. 
cocoons may be con- 
structed side by side on 
a twig, and these are 
particularly noticeable 
after the folage drops 
in the fall. The control 
measures would be the 
same as for B. canaden- 
sesella, 
: | The moth of the oak 
Figure 119.—Red oak leaf injured by the oak Skeletonizer (Buccula- 
skeletonizer (Bucculatrix ainsliella). trix ainsliella Mutt.) 
has a wing expanse of 
about 546 inch. It is creamy white, more or less obscured by dark 
brown scales. The forewings have a dark brown longitudinal band 
from the base along the costa, widening to the apical third, where it 
narrows and curves backward, with the anterior margin to the apex 
merely speckled with dark scales. Near the middle of the inner 
margin is a purple-brown spot so shaped that when the wings 
are closed it presents the appearance of a broad oval patch one-half 
of which is on each forewing. The hind wings are pale, silvery gray. 
The full-grown larva is about YY inch in length and is yellowish green. 
The molting webs, cocoons, and pupae are similar to those of B. cana- 
densisella. 
It is found in the Northeastern States, but the exact range is not 
known. The food plants include red, black, and white oaks. “In east- 
ern Massachusetts there are two generations a year. Moths are ac- 
tive during the latter half of May and late in July and early in 
August. Larvae feed during June and early July and from late 
August to the middle of October or until cold weather stops their 
activities, The larvae feed just as do those of Bucculatrix canaden- 
When abundant, many. 
