3J.IU1S 
LETTER OF TRANSMITTAL. 
U. S. Department of Agriculture, 
Division of Entomology, 
Washington, May 10, 1889. 
Sir : I have the honor to transmit for publication .Bulletin Xo. 20 of 
this Division, being a report of studies and experiments made upon the 
Angnillula, which is the cause of the root-knot disease of the Peach and 
Orange in Florida, by J. 0. Neal, Ph. D., M. D., of Lake City, Fla. 
Eespectfully, 
C. V. Hiley, 
Entomologist. 
Hon. J. M. Rusk, 
Secretary of Agriculture. 
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