V t, 
3521a 
LETTER OF SUBMTrTAL. 
Department of Agricultuee, 
Division of Entomology, 
Washington, D. 6\, January 14, 1880. 
Sir: I have the honor to submit for publication Bulletin No. 11 of 
this Division, which contains in condensed form the results of a series of 
experiments with insecticides, carried on by certain agents of the Divis- 
ion during the past summer. 
Respectfully, 
0. y. EILEY, 
Entomologist. 
Hon. Norman J. Colman, 
Commissioner of Agriculture. 
I 
