46 THE DISPERSION OF THE GIPSY MOTH. 
that year single egg clusters were discovered in each of three locali- 
ties. In the fall of 1911, 1,789 were found in 326 localities. 
The gipsy moth was first found in Hopkinton, Mass., in 1905, and 
the writer is indebted to Mr. G. A. Sands, of the Massachusetts State 
forester's office, for data concerning this town. During the winter of 
1906-7, 267 egg clusters were secured from 39 different localities. 
In 1907-8, 1.117 egg clusters were secured in 30 localities. In 1908-9, 
4,283 egg clusters were found in 90 colonies. In 1909-10, 2,124 egg 
clusters were treated in 70 localities. In 1910-11, 3,448 egg clusters 
were found in 80 localities. In some of these colonies no egg 
clusters were located during the year following the first examina- 
tion, as the trees were burlaped, examined during the summer, 
and the colonies exterminated. In other places small numbers of 
e^g clusters were found from year to year, but each year it was 
possible to obtain them in regions where they had not been known 
previously. 
The original colony in Hopkinton was southeast of the village, 
near the roadside. The following year infested places were found 
near the center of the town, and a few were located near the borders 
of the adjoining towns. The next year egg clusters were found well 
scattered throughout the town, especially in the residential section, 
and this condition prevails at the present time. Owing to the loca- 
tion of the various infestations, it is highly improbable that the 
insects could have spread by artificial means. For the past two 
years very little work has been done in this town to suppress the 
moth. 
The data for several towns following were supplied by Mr. H. B. 
Ramsey, an agent of the Masachusetts State forester, and the writer 
is indebted to him for this and other valuable information fur- 
nished. 
The condition in Westboro, a town northwest of Hopkinton, was 
not so bad in 1906-7, there having been found at that time only seven 
colonies. The number of colonies, however, steadily increased. In 
1910-11, 116 were located, containing 846 egg clusters, while in 
1911-12, 1,897 egg clusters were found in 214 localities. 
Directly northwest of Westboro is the town of Northboro, in which 
no egg clusters were found until the winter of 1909-10, although 
three pupal cases were secured during the previous year. Northboro 
is west of Marlboro, which was found infested in 1905, and if dis- 
persion of the species was equal in all directions, should have become 
infested rapidly. During the winter of 1909-10 five colonies were 
found, 14 egg clusters being treated in them. They were located 
in the southeastern and north-central parts of the town. The fol- 
lowing year 95 colonies were secured, and in these 311 egg clusters 
were treated. In 1911-12, 1,421 egg clusters were found on 180 
