LETTER OF TRANSMITTAL. 
DEPARTMENT OF AGRICULTURE. 
DIVISION OF ENTOMOLOGY, 
Washington, D. C., November 22, 1889. 
Sir: I have the honor to submit for publication Bulletin No. 21 of 
this Division, being the report of Mr. Albert Koebele upon the Fluted 
Seale (Icerya purchasi Maskell) and its natural enemies in Australia. 
I had intended to incorporate it in my forthcoming annual report, but 
the limited space alloted to that report makes it necessary to publish 
this as a separate bulletin. 
Respectfully, 
€.. VV. RiLEy, 
Entomologist. 
Hon. J. M. RUSK, 
Secretary of Agriculture. 
