LETTER OF TRANSMITTAL. 
U.S. DEPARTMENT OF AGRICULTURE, 
BUREAU OF ENTOMOLOGY, 
Washington, D. C., Aprol 10, 1906. 
Sir: I have the honor to transmit herewith a manuscript prepared 
by Dr. W. E. Hinds, special field agent of this Bureau, engaged in 
work on the boll weevil. This manuscript is a study of the pro- 
liferation in the squares and bolls of cotton by means of which a 
certain percentage of weevil larve are killed. It does not deal at 
leneth with the botanical aspects of the question, but is rather a _ 
practical statement of the effect of this formation of loose tissue cells 
upon the boll weevil, based upon a large number of observations 
made by agents of the Bureau of Entomology. The botanical side 
of this phenomenon has been fully considered by Mr. O. F. Cook, 
of the Bureau of Plant Industry, and this paper is therefore supple- 
mental to papers published by Mr. Cook on this subject. The preface - 
is written by Mr. Hunter, and the conclusions in the paper have — 
been revised by him. In addition to the general interest in the sub- 
ject, the information given will be undoubtedly of distinct advantage 
to those engaged in cotton-breeding work, and I therefore recommend 
that it be issued as Bulletin No. 59 of this Bureau. 
Respectfully, 
C. L. Marat, 
Acting Chief of Bureau. 
Hon. JamMEs Witson, 
Secretary of Agriculture. 
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