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THE PEACH-TREE BARKBEETLE. 93 
United States; and more recently experiments have been carried out 
by the Ontario experiment station in the district of Niagara. In 
looking over the past literature it is noticed that the injury done by 
the beetle has increased materially with the increased planting of 
peach and cherry, and the species has thus become one of economic 
importance. 
Until the present season (1908) few direct measures had been 
taken to combat this barkbeetle, and very little, if anything, was 
known concerning its life history. Not until recently has it become 
very injurious to fruit trees, and these are limited to peach, cherry, 
and wild cherry. The beetles will, however, work on plum trees 
when confined to that food. So far but three localities have been re- 
ported as being visited with injury to any great extent, these being in 
the fruit district lying about Lakeside and Gypsum, Ohio; in the 
vicinity of Cayuga Lake, New York, and in the Niagara district, 
Ontario Province, Canada. The effects of the beetles’ work are very 
serious in all trees attacked. 
The peach-tree barkbeetle is a native of this country, and until 
cultivated trees were introduced must have held to forest trees for 
food and breeding places. The work of the beetle is similar to that 
of the fruit-tree barkbeetle (Scolytus rugulosus Ratz.), and there 
exists a marked similarity in the beetles themselves by which the 
two species may be easily confused. 
DISTRIBUTION. 
Observations and reports show the distribution, in so far as known, 
to be as follows: New York, Pennsylvania, Maryland, Virginia, West 
Virginia, Ohio, and Michigan, and from the Niagara district, Onta- 
rio Province, Canada. Field notes on this species, in the branch of 
forest insect investigations, Bureau of Entomology, taken by Doctor 
Hopkins and Mr. W. F. Fiske, indicate that the species is found 
throughout almost all of West Virginia, and that it occurs in. North 
Carolina and New Hampshire. 
OCCURRENCE IN OHIO. 
The date of the first appearance of this insect in Ohio is in ques- 
tion, as it has undoubtedly been in the State for some time, although 
it has not done any great amount of damage until recently. Some 
of the orchardists stated that they had seen its work for eight or ten 
years, but did not know the cause. An area of about 8 or 10 miles 
square about Lakeside, Ohio, including the adjacent islands, is badly 
infested. Outside of this locality the beetles occur east and west to 
