LETTER OF TRANSMITTAL, 
U.S. Deparrment oF AGRICULTURE, 
Diviston or ENTOMOLOGY, 
Washington, D. C., November 26, 1901. 
Str: While Mr. W. E. Hinds was temporarily employed as an assist- 
ant in this Division during the summer of 1901 he was instructed to 
conduct certain practical experiments with the use of bisulphid of 
carbon against the cigarette beetle (Zas/oderma serricorne) in a large 
wholesale and retail tobacco establishment in the city of Washington. 
The successful prosecution of this work made it necessary for Mr. 
Hinds to familiarize himself thoroughly with the subject, and it has 
seemed to me very desirable that the results of his studies should be 
formulated in a Farmers’ Bulletin for the use of persons interested in 
the destruction of insects injurious to stored products, underground 
insects, household pests, museum pests, tree borers, and sucking insects 
on small plants. I have, therefore, instructed him to prepare such a 
bulletin, and I submit his manuscript with the recommendation that it 
be published as a Farmers’ Bulletin. 
Iam indebted to Mr. E. E. Ewell, of the Bureau of Chemistry, for 
the purely chemical portion of this bulletin, which is printed as an 
appendix. 
Respectfully, L. O. Howarp, 
Lintomologist. 
Hon. James Witson, 
Secretary of Agriculture. 
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