THE BROWN-TAIL MOTH. 
127 
1106 
- U - iqo3 
Fig. 18.— Map showing the gradual spread and distribution of the Brown- 
tall Moth in New Hampshire. Djtted area infested in 1S06. Heavy lines are 
outer boundaries of areas infested in years indicated at margin. Dash lines 
represent approximate boundaries not personally investigated, based on 
points infested north of them. Black circles show points examined in Jan- 
uary, 1906, and found uninfested. Black squares show points examined in 
December, 1906, and found uninfested. Towns shaded with horizontal lines 
found Infested in December, 1906, and those underlined within 1906 boundary 
are undoubtedly infested, though not personally examined. 
