-2U9- 
FOREST TENT CATERPILLAR ( Malacosoma disstria Hbn.) 
Maine. H. B, Peirson (June 15): ' This insect is occurring in grea.t abundance, 
completely stripping poplars in central Maine* 
S. E, Mullen (June §)j Seve;ral areas of woodland in Cumberland County, 
southwestern Maine, are defoliated from 50 to 75 percent. 
New Hampshire, J. G-. Conklin (June 2H): Has "been very abundant throughout the 
State, Widespread defoliation observed in towns bordering the Connecticut 
River and along the eastern border of the State, 
Vermont, H, L, Bailey (June 29): Causing severe or complete defoliation, par- 
ticularly in sugar maple orchards over the State generally. The first 
cocoons were observed on June 10, 
Massachusetts, A. I, Bourne (June 23): This caterpillar is .again abundant. 
There is no evidence of any reduction in numbers from last year, 
W. W. Bancroft (June 13)* Defoliation is noticeable in several 
towns west of the Connecticut River, 
C, W, Cole (June 19) 5 Infestation of maple and. oak is heavy in 
the Mount Toby Reservation in Franklin County, west of the Connecticut 
River, The population is 50 percent greater than in 193&* 
Connecticut, B, H, Walden (June): This" insect is occurring locally; probably 
less abundant than in 193 &• 
New York, 77, E, Blauvelt (June): Abundant in many localities throughout the 
State, particularly in the Cat skills, and has caused rather extensive de- 
foliation, of maples, 
J. V, Schaffner Jr t (June 20): In Essex County, large areas of 
forest are defoliated, defoliation extending well'up the mountain sides. 
The growth is. largely poplar and paper birch, 
Pennsylvania. W, H, Hanley (June 7): Severe defoliation of maple, ash, and 
linden. has occurred in TJayne County, in northeastern Pennsylvania, 
Michigan, R. Hut son (June 22): The forest tent caterpillar is nearly full 
grown in the northern part of the southern peninsula', 
Minnesota, L. 77, Orr (June 10): The outbreak this year in the northern and 
northeastern parts of the State is not so severe as in 1936, but is very 
great in areas where this is the first or second year of complete defo- 
liation. The young larvae appeared from May 5 to 10, but were retarded 
by cool, rainy weather. They are now developing rapidly, most of them 
being in the fourth and fifth instars. 
