LETTER OF SUBMITTAL. 
Department of Agriculture, 
Division of Entomology, 
Washington. I). C, March 15, 1884. 
Sir: On behalf of the United states Entomological Commission, and 
in accordance with the act of Congress, approved March 3, 1881, which 
provides that the reports ot* said Commission be made to the Commis- 
sioner of Agriculture, I have the honor to submit this, its fourth report. 
Respectfully, 
C. V. RILEY, 
Chief U. S. K C. 
lion. George B. Loring, 
Commissioner of Agriculture. 
