LETTER OF TRANSMITTAL. 
U. S. DEPARTMENT OF AGRICULTURE, 
Division oF ENTOMOLOGY, 
Washington, D. C., May 19, 1902. 
Srr: I have the honor to transmit herewith the manuscript of a 
report on the codling-moth investigation in the Northwest during 
1901, conducted by Mr. C. B. Simpson, a special agent of this Division, 
and prepared by him for publication. Fruit growers in the North- 
west, and especially in the States of Idaho, Washington, and Oregon, 
have complained that conditions in that part of the country must be 
very different from those which hold in the Eastern apple-growing 
sections, Inasmuch as the remedial treatment which is found satisfae- 
tory in the East does not give equally good results in the Northwest. 
Therefore, under a special appropriation from Congress, some work 
yas begun by this office in the late summer of 1900, Mr. Simpson 
being appointed to carry out the investigation and experiments. A 
report upon the work which he did in the season of 1900 was published 
in Bulletin 30 (new series) of this Office (pp. 51-63). In 1901 he was 
able to make a somewhat earlier start, and the results were therefore 
more satisfactory. This work is described in the accompanying bul- 
letin. The present summer (1902) Mr. Simpson started for the field 
early in May, and it is hoped that at the close of the season the inyesti- 
gation will have arrived at such a point as to enable the publication of 
a full and satisfactory bulletin covering the whole problem. I recom. 
mend this bulletin to be published as No. 35 (new series). 
Respectfully, 
L. O. Howarp, 
Hon. JAmEs WILson, Entomologist. 
Secretary of Agriculture. 
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