BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 31 
survey, infestations had been found in seven towns in which the moth was not 
previously known to exist. One of the new infestations is in southeastern 
Connecticut, 2 are in New Hampshire, and 4 are in Maine. 
Within the infested section, satin moths were noticed depositing egg masses 
at Concord, N. H., as early as June 6. In northeastern Maine moths were 
found ovipositing as late as August 2. District inspectors in New Hampshire 
and Maine observed very little satin moth feeding, as compared with the 1933 
defoliation. In some localities where large numbers of hibernating larvae were 
noted in the fall of 1933 there were no signs of feeding in the summer of 
1934. Satin moth egg clusters were not as numerous in the quarantined zone 
as they were in the summer of 1933. 
By arrangement with the Division of Foreign Plant Quarantines, an inspec- 
tor from the port inspection office at Seattle, Wash., was detailed from July 
22 to August 12 to scout a tier of counties in central Washington east of the 
area in the State designated as satin moth regulated area. Observations were 
confined to black cottonwoods and willows, the host trees of the insect in the 
Pacific Northwest. Three weeks' scouting in Klickitat, Yakima, Kittitas, 
Chelan, and Okanogan Counties gave negative results. 
DUTCH ELM DISEASE ERADICATION 
SYSTEMATIC SCOUTING 
At the outset of the fiscal year elm trees confirmed as infected with the 
Dutch elm disease (Ceratostomella ulmi (Schwartz) Buisman) numbered 2,01:2 
in New Jersey, 8 in Connecticut, and 1,235 in New York. This total of 3,L!r»5 
diseased trees had been discovered as a result of scouting operations carried 
on in a tri-State area of 1,400 square miles since the disease was first detected 
at Maplewood, N. J., in June 1933. 
Systematic scouting, already under way for several weeks on July 1, 1934, 
continued until the end of August, when reduced funds necessitated dismissal 
of Federal scouts. Scouting was continued in New York with men employed 
on State funds until brisk autumn winds in October defoliated the elms and 
forced abandonment of foliage scouting for the season. Before discontinuance 
of summer scouting, all of the originally known infected area in New Jersey 
and Connecticut had been surveyed twice, and the New York State scouts had 
finished a partial third survey. Discovery of infection at points near the 
margin; of the infected zone required several extensions of the 10-mile pro- 
tective zone included as an additional work area circumscribing the known 
infections. It was principally in these extensions that scouting was hurried 
and incomplete. 
Definite and severe wilting of elm foliage, later confirmed as Dutch elm 
disease infection, was first observed during the summer of 1935 in the Bronx, 
New York, N. Y., on May 16. Systematic scouting from that date to the end 
of June resulted in the finding of 904 additional cases of infection, 559 located in 
New Jersey, 341 in New York, and 4 in Connecticut. 
EXTENSION OF WORK AREA 
Discoveries of infected elms at points beyond the previously known diseased 
area were made during July, August, and September 1934 at 6 points in New 
York, 4 locations in New Jersey, and 3 towns in Connecticut. New Jersey 
finds were made 3 miles north of Hopewell in Montgomery Township, Somerset 
County: at Petersburg, in Morris County; at Echo Lake, in Passaic County: 
and at Princeton, in Mercer County. The most remote infections found in 
New York during 1934 were at Katonah, Cross River, and Crugers, in West- 
chester County: Stony Point and Sloatsburg, in Rockland County; and just 
west of the Suffolk-Nassau County lino near the village of Centra] Park on 
Long Island. Contiguous to the 193.'! known infected zone in Connecticut, 
new infections were found in Norwalk and about 4 miles north of the village 
of Fairfield, both points in Fairfield County. 
New finds at points isolated from the tri-State zone of infection comprised 
1 infected tree in Old Lyme, Now London County, Conn., 4 in Indianapolis. End., 
and 1 in Norfolk, Va. As a result of 1934 scouting in Cleveland, Ohio, where 
the disease was found in 1930. 1931. and 1933, two additional infected trees 
were removed. 
Included in the tri-State infected zone at the end of the fiscal year was a 
total of 2,478 square miles, of which 1,402 square miles were in Now Jersey, 
