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CIRCULAR 4 6 4, IT. S. DEPARTMENT OF AGRICULTURE 



The insect continued to spread until 1915, when most of the area 

 east of the Connecticut River, with the exception of a portion of 

 northern New Hampshire and Maine, was heavily infested. Some 

 infestation also existed in Vermont and west of the Connecticut River 



* 



Figure 16.— Life stages of the brown-tail moth: ^4, Winter nest; B, male pupa; C, female pupa; D, cocoon 

 in leaves; E, young caterpillars on leaf; F, full-grown caterpillar; G, female depositing eggs on a leaf, and 

 egg mass also on leaf; H, egg mass removed from leaf and with some of the eggs exposed; J, male moth; 

 J, female moth. All about three-fourths natural size. 



in Massachusetts and Connecticut. Suppressive work carried on 

 by the States and the Federal Government kept the residential 

 sections fairly free from this pest. 



The area now infested by the brown-tail moth is shown in figure 1, 

 and is much less extensive than formerly. Low winter temperatures, 



r 



