DISTRIBUTION. 19 
curculio carried out during 1904 between the Agricultural Experi- 
ment Station of Cornell University (Bulletin 235) and certain fruit 
growers in western New York. Mr. E. P. Taylor, in Bulletin 21 of 
the Missouri State Fruit Experiment Station, reports results in 
spraying for the control of the curculio on apple as obtained by him 
in the Ozark regions of Missouri. Observations on the curculio and 
results of experiments are given by W. W. Chase in Bulletin 32 of 
the Georgia State Board of Entomology, published in 1910. 
Beginning in 1905, investigations of the curculio were undertaken 
by the Bureau of Entomology of this department, and more or less 
attention has been given to this insect up to the present time. The 
investigation has included an inquiry into the life history and habits 
of the insect in various parts of the country and the carrying out of 
experiments in spraying on a commercial scale in its control on 
peaches, plums, and apples. As a result of the work in 1905, recom- 
mendations concerning the use of an arsenate-of-lead spray on 
peaches were given in the Yearbook of the Department of Agriculture 
for that year (p. 329) and in Circular 73 of the Bureau of Entomology. 
In the course of experiments to determine the comparative value of 
the one-spray method in the control of the codling moth much infor- 
mation was obtained on the value of spraying for the curculio, the 
results of which were published in Bulletin 80, Part VII, of the 
Bureau of Entomology. 
A decided advance in spraying stone fruits, especially peaches, 
was made with the establishment of the practicability of the control 
of brown-rot, scab, and curculio on peaches by the use of a combined 
spray of lime-sulphur and arsenate of lead. Recommendations for 
the preparation and use of this spray were given in Circular 120 of 
the Bureau of Entomology, and in Farmers’ Bulletin 440 results of 
further experiments and demonstrations were given. 
In the foregoing historical sketch it has been attempted to indicate 
only the principal contributions or landmarks in the progress of 
knowledge concerning this insect and the remedies against it. By 
turning to the bibliography (p. 219) the reader will find reference to 
most of the contributors, although the list of titles could still be 
considerably lengthened. 
DISTRIBUTION. 
The curculio is indigenous to the eastern United States, and has 
probably always occupied about its present range of distribution. 
In some of the earlier accounts of the insect the inference is given 
that it had gradually spread westward from more eastern regions. 
As shown elsewhere (p. 156), its injuries were first noted in the 
neighborhood of Philadelphia about 1736. 
