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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 13 
< 
and Cleveland, and present at Boston, Detroit, and Chicago. The 
carpenter borer, Prionoxystus robinicc, is a steady worker, being plenti¬ 
ful this year around New York, Pittsburgh, and Detroit, and 
noticed at Boston, in Connecticut, Baltimore, Cleveland, and 
Chicago. 
As a bark borer, Eccoptogaster multistriata, on the elm was reported a 
number of times from along the Hudson River and in northern Vir¬ 
ginia. At Boston, Cleveland, Detroit, and Chicago, these borers 
were quite numerous. The locust would be a more valuable tree if it 
were not for the borer, Cyllene robinice, which this year was quite 
conspicuous at Newport, around New York, and especially on Long 
Island, at Philadelphia, Baltimore, Pittsburgh, Detroit, and Cincinnati. 
The locust twig borer, Ecdytolopha insiticiana , was reported from 
Long Island, northern Virginia and near Cleveland. The leopard 
moth, Zeuzera pyrina, was found only at Boston, Newport, and Long 
Island. The sugar maple borer, Plagionotus speciosus, was quite 
abundant in northern New Jersey and along the Hudson as well as in 
Connecticut, and down the coast to Philadelphia, at Pittsburgh, and 
Cleveland. While at Boston and Chicago evidence of its work was 
found. The maple sesian, Sesia acerni, seems to prefer the soft 
maples and is usually found hindering the growth around wounds. It 
was quite common in Connecticut and along the Hudson, at Philadel¬ 
phia, Detroit, and Chicago. 
The twig pruner, especially Elaphidion villosum, is often injurious to 
a tree but usually the objection is the unsightly appearance of the 
tree or the lawn beneath. From Albany to Washington they were 
very conspicuous, as well as at Newport, Detroit, and Chicago. 
Around Chicago the two lined chestnut borer, Agrilus bilineatus, was 
injuring oaks this year. It was also reported from Albany and Long 
Island. One of the most common insects found in cavities in trees is 
the black carpenter ant, Camponotus species. Give them an opening 
and in they will go and by making tunnels and galleries, they quickly 
weaken a tree structurally. They were reported abundant from 
Boston to Baltimore and numerous from Pittsburgh to Chicago. The 
red spiders, Tetranychus sp., seem to be causing increasing injury to 
oaks, maples, and beeches. They were fairly abundant in every section. 
This, then, in a brief way, is the distribution of the shade tree insects 
in 1919. 
Dr. L. O. Howard: I would like to ask Mr. Hollister, if 
the where canker worms were abundant, he found they were 
eaten by birds. 
Mr. W. 0. Hollister: That was noticed at Kent, Ohio. 
