4 CIRCULAR 4 6 4, U. S. DEPARTMENT OE AGRICULTURE 



boundary of the zone to embrace the entire State of Vermont and 

 additional towns in northwestern Connecticut. A foreign quaran- 

 tine regulating the movement of Christmas trees was made effective 

 covering the southern tier of towns in the Province of Quebec. In 

 1926, owing to the effectiveness of the clean-up work in the zone and 

 the fact that scouting west of the zone showed no infestation, the 

 area under quarantine lying in the zone was eliminated from quaran- 

 tine. The Canadian quarantine was withdrawn July 1, 1928. 



LEGEND 



FuITiiTI AREA QUARANTINED FOR GYPSY MOTH 1934. 



•• DELIMITS AREA QUARANTINED FOR BROWN-TAIL MOTH 1934. 



BARRIER ZONE. 



AREA REMOVED FROM BARRIER ZONE 1934. 



PENN. GYPSY MOTH INFESTED AREA. 



ISOLATED GYPSY MOTH 

 INFESTATIONS IN N.J. AND N. Y. 



Figure 1.— Barrier zone and status of the gypsy moth and brown-tail moth control areas at the end of 1934. 



Later in 1928 more infestations were found in the Massachusetts 

 and northern Connecticut portions of the barrier zone than during 

 the previous fiscal year. This made the problem far more difficult 

 and emphasized the necessity of carrying on work in the territory 

 east of the zone to facilitate eradication in the zone itself. Since 

 there was also an increase in infestation directly east of the zone, 

 7 towns in Vermont, 12 in Massachusetts, and 31 in Connecticut, 

 embracing an area of 1,581 square miles, were reclassified from the 

 lightly infested to the generally infested area. 



