56 THE DISPERSION OF THE GIPSY MOTH. 
•carried a considerable distance by the wind. The infestation men- 
tioned was in a small block of woodland, mostly deciduous growth, 
which borders Crystal Lake, and is west of Woodland Avenue, and 
in this place four new egg clusters were found. Another infestation 
of a single egg cluster was on a maple tree 500 feet from the high- 
way, but there were two infested orchards within 1,000 feet, and it- 
is probable that the spread came from these orchards. The cater- 
pillars may have been carried by the wind or on men or animals. 
A third infestation was found near the Winchendon line, but egg 
clusters had been previously discovered on several old apple trees in 
a pasture near the woodland. 
Any of these colonies may have been brought about by wind 
spread, but the evidence is not strong. The unfavorable character 
of the trees would prevent, to a large degree, the establishment of 
the insect in woodland in this town. 
RECORD OF SCOUTING IN GRAFTON, MASS. 
On March 11, 1912 an examination of Grafton, Mass., was begun 
by scouts working under the direction of Mr. H. L. Mclntyre. All 
the territory east of the Grafton & Upton Railway was examined, 
and a part of the woodland near Farnumsville was also scouted. The 
town is generally infested with the gipsy moth, and it is possible to 
find egg clusters in nearly every orchard. The area examined cov- 
ered about 5 square miles of woodland. No orchards or estates were 
scouted. The different kinds 'of trees in the woodland were estimated 
as follows: 
Per cent. 
Conifers 6 
Oak 1 21 
Maple 23 
Elm 1 
Per cent. 
Chestnut 18 
Ash 1 
Birch and beech 14 
Miscellaneous 16 
As a result of the scouting the following infestations were located: 
One old egg cluster on a birch tree in woodland near North 
Grafton, two colonies on the land of the State insane hospital, one of 
18 egg clusters near the barns, and the other of 25 egg clusters on a 
large oak tree on the edge of the woodland in the rear of one of 
the buildings. As there is quite a general infestation of the fruit 
trees on these grounds it is probable that these colonies were es- 
tablished by caterpillars carried on men or farm animals to the 
places where the egg clusters were found. An infestation of two 
clusters was located near the Westboro line in oak growth. Five 
infestations were found in two blocks of woodland on Esterbrook 
Avenue. In one block, where three colonies were found, four egg 
masses were discovered, three new and one old. while in the other 
