U. S. DEPARTMENT OF AGRICULTURE, 
BUREAU OF ENTOMOLOGY — BULLETIN No. 91. 
L. O. HOWARD. Entomologist and Chief of Bureau. 
THE IMPORTATION INTO THE UNITED STATES 
OF THE PARASITES OF THE GIPSY MOTH 
AND THE BROWN-TAIL MOTH : 
A REPORT OF PROGRESS, WITH SOME CONSIDERATION OF 
PREVIOUS AND CONCURRENT EFFORTS OF THIS KIND. 
L. O. HOWARD, 
Chief, Bureau of Entomology, 
W. F. FISKE, 
In Charge, Gipsy Moth Parasite Laboratory, 
Melrose Highlands, Muss. 
WASHINGTON : 
GOVERNMENT PRINTING OFFICE. 
1911. 
