A RECENTLY INTRODUCED PEST 5 
In 1921, .1922, and 1923 little scouting was done, but an attempt 
was made to determine the situation in Massachusetts with respect 
to the satin moth b}^ requesting information from all of the towns 
known to be infested with it and in a double row of towns bordering 
the infested territory. The information obtained was furnished by 
* superintendents of local work against the gipsy moth. A similar 
request for information concerning the, situation in the towns in New 
Hampshire known to be infested, and in those immediately sur- 
rounding the infested area, was made to the State entomologist of 
New Hampshire. As a result of these requests, with information 
acquired by the Federal force in 1921, four towns in Massachusetts 
and one in New Hampshire were included in the infested area. In 
1922 no newly infested towns were reported. In 1923 two more 
towns were added to the infested area in Massachusetts; and, of 57 
New Hampshire towns that were inspected, 41 were found to be 
infested. 
Very little scouting was done in New Hampshire in 1924, but it 
resulted in the inclusion of four additional towns in the infested 
area. In Massachusetts scouting was carried on by inspectors of the 
State department of agriculture, chiefly in the southern part of the 
State, by which 34 towns were added to the infested area. 
In 1925 many towns were added to the infested territory, and the 
satin moth was found for the first time in Maine and in Khocle 
Island. The new records of occurrence of the satin moth were made 
in 42 towns in Maine, 21 in New Hampshire, 80 in Massachusetts, and 
11 in Rhode. Island. 
Scouting in 1926 resulted in the addition to the area quarantined 
against this moth of 16 towns in Rhode Island, 2 in Connecticut, 24 
in Massachusetts, 24 in New Hampshire, and 32 in Maine. 
The present distribution of the satin moth in New England (fig. 2) 
covers an area of approximately 12,114 square miles. The infested 
territory lies along the Atlantic coast, covering an area about 60 
miles wide and extending from the city of Belfast, Me., to Ston- 
ing! on, Conn. 
The spread of this insect in New England has been rapid, and 
principally toward the north and northeast, as was the case in the 
dispersion of the brown-tailed moth, the gipsy moth, and several 
other insects. The record of the yearly distribution, as determined by 
the reports and scouting records, is merely suggestive of the direction 
and rapidity of the spread of this insect, for, with the exception of 
the work done in 1920, 1925, and 1926, no systematic attempt has been 
made to determine the exact spread of the insect. 
DESCRIPTION AND HABITS 
% THE MOTH 
The insect derives its name from the white, satinlike appearance 
of the moths, which are larger than most of the white moths native 
to New England and have no colored markings on the wings. (PI. 
1, 3, I) 
Males 15 to 20 ram., females 20 to 25 mm. in length. Wing expanse 35 to 
60 mm. Males slightly smaller than females. Head, thorax, and abdomen 
black, densely covered with long white hairs and scales, giving the moth a 
