42 NEW YORK STATE MUSEUM 
ance from one locality to another. The continued exercise of vigi- 
lance by both state and national authorities may perhaps delay the 
invasion of this State for a decade or more. The warning placard 
illustrating both this species and the brown tail moth, has been 
conspicuously posted in many post offices and other public places 
located in portions of the State where the pest is most lable to 
appear. Additional copies are on hand and can be used to replace 
those broken or lost and also for sending to other localities should 
future developments warrant such procedure. 
A better idea of what gipsy moth infestation means may be 
gained from the following notes made June 24, while examining 
conditions in the infested territory. Starting from Boston we 
passed through Cambridge and Brookline to Waltham, observing 
in particular conditions in Waltham park. This latter comprises 
ever 100 acres of rocky land mostly covered with a dense growth 
Ci oaks some 20 to 40 feet high. No winter work such as creo- 
soting egg masses on trees and clearing out underbrush was done, 
though the whole was rather badly infested. The entire park was 
sprayed with poison with one of the giant outfits described below, 
though the application was made rather late. The results were 
very gratifying, since practically no trees were seriously injured 
by caterpillars, though the park is surrounded by badly infested 
territory. The policy has been to safeguard such treated areas by 
clearing a strip about 100 feet wide around the entire border. This 
is done by cutting out and burning all underbrush and then apply- 
ing tree Tanglefoot to the trunks of the remaining trees, so as to 
prevent caterpillars from ascending the trees. The latter do not, 
as a rule, pass this barrier, though at the time of our visit some 
were entering the park and supplementary spraying was necessary 
here and there in order to prevent further damage. Continuing 
from Waltham we passed through Arlington, Winchester and 
Stoneham to Melrose. . Here and there along the entire route con- 
siderable woodland areas were stripped or nearly defoliated by 
gipsy moth caterpillars, and in one instance at least, the badly 
affected area was fully a mile and a quarter in length. These 
woodlands were all on hillsides and consisted mostly of oak rang- 
ing from 20 to 50 feet or more in hight. These stony hills are 
said to have very little agricultural value, being rated at $15 per 
acre. The cost of adequately controlling a pest like the gipsy 
moth in such situations is at once apparent. The general condi- 
