REPORT OF THE STATE ENTOMOLOGIST 1907 13 
INJURIOUS INSECTS 
Green striped maple worm 
Amsota rubicunda Vabr. 
This species was responsible, in a large measure, for the extensive 
injuries inflicted upon the hard maples in and about Berlin; 
Rensselaer co., N. Y. during late summer. The caterpillars were 
so abundant over considerable areas as to literally defoliate acres 
of trees besides inflicting much injury upon many others over an 
extended tract. | 
This outbreak commenced in 1906 and at that time was supposed 
to be the work of the forest tent caterpillar, Malacosoma 
disstria Hubn., as no specimens were submitted by which its 
identity could be established. The initial outbreak occurred in a 
sugar bush a short distance north of Center Berlin, and in 1906 a 
number of acres were defoliated in this section. The injury in 
1907 was first reported to this office August 12, at which time some 
sugar orchards had been stripped of their leaves and others were 
badly infested by the caterpillars. A personal investigation of the 
conditions September 14 showed that this insect had been abundant 
over an area ranging from the vicinity of Stephentown through 
North Stephentown, South Berlin and north of Berlin Center, the 
greatest injury being inflicted in the vicinity of the last named vil- 
lage. The first signs of the infestation were observed a little to the 
north of Stephentown, on small roadside sugar maples, some of 
which had lost most of the foliage on the upper branches, while the 
smallest trees were nearly denuded of leaves. This attack, for some 
inexplicable reason, appeared to be confined almost entirely to the 
smaller trees, as not a few large sugar maples along the roadside 
were exempt from injury. The hills to the east of the road from 
Stephentown north, showed evidence here and there of extended 
feeding, while at North Stephentown large tracts were nearly 
defoliated. Just north of Center Berlin one sugar bush of some 
six or more acres had been entirely stripped and at the time of our 
visit the trees were throwing out new leaves [pl. 1, fig. 2]. It is 
worthy of note that this species has been recorded by Miss Patch 
as defoliating maples in certain localities in Maine during 1907. 
Previous outbreaks by this insect have been limited to but one or 
