Bebe woke PRANS MIETA L. 
U. S. DEPARTMENT OF AGRICULTURE, 
Bureau OF ENTOMOLOGY, 
Washington, D. C., April 12, 1911. 
Srr: I have the honor to transmit herewith the manuscript of a 
report of progress on the importation into the United States of the 
parasites of the gipsy moth and the brown-tail moth. To this has 
been added some consideration of previous and concurrent efforts to 
handle the parasites of destructive insects in a practical way. The 
work with the foreign parasites of the gipsy moth and the brown- 
tail moth has been going on now for rather more than five years. 
It promises excellent results, and the present seems the proper 
time to present to the people interested a somewhat detailed account 
of what has been done and of the present condition of the work. I 
recommend that this manuscript be published as Bulletin No. 91 
of this bureau. 
Respectfully, L. O. Howarp, 
Entomologist and Chief of Bureau. 
Hon. JAMES Wixson, 
Secretary of Agriculture. 
Ys 
