LETTER OF TRANSMITTAL. 
U.S. DEPARTMENT OF AGRICULTURE, 
DIVISION OF ENTOMOLOGY, 
Washington, D. C., December 3, 1901, 
Str: I have the honor to transmit herewith the manuseript of the 
Proceedings of the Thirteenth Annual Meeting of the Association of 
Economie Entomologists, which was held at Denver, Colo., August 2: 
and 24, 1901. From the fact that the papers presented at the meet- 
ings of the Association are always of great economic importanee, the 
Department has hitherto published the secretary’s reports as bulletins 
of this Division; I therefore recommend the publication of the present 
report as Bulletin No. 51, new series. 
Respectfully,” 
L. O/. Wowarp, Entomologist. 
Hon. JAMES WILSON, 
Secretary of Agriculture. 
