BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 27 
locations. By correlating these records and using the field-scouting 
data secured in the control work, the conclusion has been definitely 
reached that during the last 2 years weather conditions coupled with 
re infestation in the Connecticut River Valley have been unusu- 
ally favorable for wind spread toward the north and northwest. In 
scattered locations in the zone many colonies of a single egg cluster 
have been found that could not have become established in any other 
way. 
A relatively small amount of work. has been done on the brown-tail 
moth, although contact has been kept with the State and local organi- 
zations working on this problem. In some sections of Maine, New 
Hampshire, and Massachusetts, the only States now known to be 
infested, this insect has been destructive, and there has been a general 
increase in abundance during the year. 
The regular appropriation of $275,718 supplemented by W. P. A. 
work-project allotments of $945,970. provided funds for the continua- 
tion of Federal gypsy moth control work. The regular funds were 
$25,000 less and the W. P. A. allotments approximately $351,000 less 
than were provided for gypsy moth control in 1938. With the W. P. A. 
funds available in 1939 an average daily force of 1,162 workers was 
employed, practically all of whom were drawn from relief rolls. 
SCOUTING AND TREATMENT FOR THE GYPSY MOTH 
As a result of intensive check-up work at sites of infestations dis- 
covered in the New England section of the barrier zone and in Penn- 
sylvania during the fiscal year 1938, it was determined that 50 infesta- 
tions had been exterminated in the Massachusetts portion of the zone 
area. 32 in the Connecticut section, and 89 in the Pennsylvania area, a 
total of 171. 
Sites of infestations located in 1938 in the towns of Calais and 
Princeton in Washington County. Maine, were intensively scouted by a 
small force of experienced employees. Xo evidence of the gypsy moth 
was found in Princeton, but three small infestations were located and 
treated in Calais. In cooperation with the authorities of the Dominion 
of Canada responsible for pest-control work, these infested sites were 
sprayed in June 1939. 
Work in Vermont was confined to the barrier zone and to a few 
towns east of Rutland where the clanger of wind spread into the zone 
seemed greatest. Forty-one infestations aggregating 47 egg clusters 
were found in 6 towns in Addison County. This indicates that in the 
spring of 1938 there was considerable wind spread of young cater- 
pillars from heavily infested areas near the Connecticut River up the 
White and Black River Valleys and into the barrier zone. One high- 
power sprayer was used in June in treating several infestation^ <>n 
high elevations in towns adjacent to the zone east of Rutland. The 
Connecticut River Valley towns in Vermont and Xew Hampshire are 
heavily infested from the Massachusetts State line approximately 100 
miles north to Newbury, Vt. Within this territory extensive areas of 
heavy feeding have been observed this year. 
In Massachusetts 65 percent of the W. P. A. field force was employed 
in the barrier zone in Berkshire County. The remainder of the work 
was done in selected areas, most of which Ave re adjacent to the zone in 
