40 THE DISPEKSIOX OF THE GIPSY MOTH. 
During the period from 1906 to 1909 a large extent of scouting 
was done by the State of Massachusetts in the territory outside of 
the area known to be infested, and, as a result. 44 new towns and 
cities were found infested. Isolated colonies were found at Green- 
field, at Palmer, at Springfield, and at Warren during the scouting 
operations, but all of them have since been exterminated. In New 
Hampshire scouting work was carried on under the direction of 
Mr. D. M. Eogers. special agent of the Bureau of Entomology. The 
infested area was found to have greatly increased. Scouting was 
also carried on in Maine and Ehode Island and showed that the 
infested area was increasing, and one isolated colony Avas found in 
Togus, Me. At the close of this period of scouting the entire area 
of infestation covered nearly 7.300 square miles. The greater part 
of the spread had been toward the northeast and northwest, and 
it is interesting to note that the prevailing winds blew in these di- 
rections, especially from the southwest. (See map 1.) 
During the period from 1909 to 1912 the infested territory has 
continued to increase. Xearly all the scouting work has been done 
by agents of the Bureau of Entomology, although a small force has 
been employed by the States of Maine. Massachusetts, and Con- 
necticut. The infested territory has continued to increase along the 
line of the prevailing winds, as is shown on map 1 and by its 
wind diagram. In the fall of 1909 an isolated colony was found 
at TTallingford, Conn., but careful scouting for miles in all directions 
has failed to locate other infestations in that part of the State. It 
is probable that egg clusters were brought to TTallingford on market 
boxes or in packing material. The thorough treatment which has 
been given under the direction of the State entomologist. Dr. TV E. 
Britton, and his assistant has reduced the colony to a point approach- 
ing extermination. The same is true of the colony at Stonington, 
Conn. 
In the summer of 1911 the gipsy moth was discovered on an estate 
in the town of Lenox in the western part of Massachusetts, and 
scouting work has resulted in locating it in Stockbridge and Great 
Barrington. It is probable that in Lenox and Stockbridge the in- 
festation resulted from the receipt of a carload of nursery stock 
(Pis. XIV. XV, XVI) which was shipped by the Boston Park 
Department about 1909 to the estate where the infestation was found. 
The origin of the Great Barrington infestation is obscure, but fur- 
ther scouting of the town may uncover conditions which will explain 
the reason. The colony at Togus, Me., has been exterminated, no 
specimens having been found since 1908. 
As a result of the scouting operations during the past winter it 
is shown that 10.900 square miles are now infested with the gipsy 
moth. The territory which is now badly infested is well outside 
