4 FARMERS' BULLETIN 846. 



priatioii was made by Congress for suppressing it, and the Secre- 

 tary of Agriculture was authorized to take all possible measures to 



FIG. 1. Map showing area infested by and quarantined for the gipsy moth and the brown-tail moth in 

 New England, 1917. Shaded area infested by the gipsy moth; area east of heavy line infested by the 

 brown-tail moth. 



prevent its spread. Since that time work has been carried on each 

 year. The area now known to be infested is shown in figure 1 . 



