SUMMARY OF INSECT CONDITIONS DURING 1921, 



49 



Fig. 27. — Geographical 

 distribution of the 

 gipsy moth in the 



United States: The 

 inner line incloses 

 the area of general 

 infestation, while 

 the area between 

 the outer and inner 

 lines and the area 

 in New Jersey were 

 only lightly infested 

 in 1921. 



UiG. 2S. — Geograph'c.i 1 

 distribution of the 

 brown - tail moth: 

 The innermost line 

 incloses the area of 

 general infestation, 

 the intermediate 

 line limits the in- 

 festation of 10 2 1. 

 and the outermost 

 line limits the* in- 

 festation of 10 14. 



