LETTER OF TRANSMITTAL. 
U. S. Department of Agriculture, 
Division of Entomology, 
Washington, B. <?., October 31, 189 >2. 
Sir: I have the honor to transmit herewith, for publication as Bul- 
letin No. 29 of this Division, a report by Mr. F. W. Mally upon the 
Boll Worm of Cotton (Heliothis armiger Hiibn.), the first part cover- 
ing his observations upon the parasites and natural enemies of the 
Boll Worm while the second part is devoted to his bacteriological ex- 
periments with certain insect diseases affecting this larva. 
Respectfully, 
C. V. Riley, 
Entomologist. 
Hon. J. M. Rusk, 
Secretary, 
