LETTER OF SUBMITTAL 
U. S. Department of Agriculture, 
Division of Entomology, 
Washington, D. (7., February 27, 1891. 
Sir : I have the honor to submit for publication Bulletin No. 24 of 
this Division. It consists of a preliminary report upon the special in- 
vestigation of the Cotton Boll worm (Heliothis armigera Htibn.) which 
was authorized by Congress in the bill making appropriations for the use 
of the Department for the fiscal year 1890-91. 
Respectfully, 
C. V. ElLEY. 
Entomologist. 
Hon. J. M. Rusk, 
Secretary of Agriculture. 
