INSECT ENEMIES OF EASTERN FORESTS 415 
the New England States and the Maritime Provinces of Canada, and 
in 1944 it was found in New York, near Albany. From British Co- 
lumbia it had spread into the States of Washington and Oregon, west 
of the Cascade Range. Federal and State quarantines have been main- 
tained to prevent shipment of this species into areas not infested. 
SEASONAL History aNpD CHARACTER OF FEEDING.—There are two gen- 
erations annually in portions of Japan and Europe. In New England 
#IGURE 84.—The satin moth (Stilpnotia salicis) : A, Adults; B, pupae; OC, larva ; 
D, egg cluster; #, cocoon; and F’, hibernating web on bark. 
the moths emerge between the latter part of June and late in July. 
Both sexes are strong fliers and are attracted to lights. Most of the 
eggs are deposited during July, oviposition reaching a peak about the 
middle of the month. Hatching takes place in about 15 days, or early 
in August. The larvae feed on various species of poplar and willow, 
the native species of the Northeastern States apparently being least 
favored. The young larva feeds only upon the epidermis of the 
leaves. After feeding for 5 or 6 days the first instar encloses itself 
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