

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 S031E CONSIDERATION OF 

 PREVIOUS AND CONCURRENT EFFORTS OF THIS KIND. 



L. O. HOWARD, 



Chief, Bureau of Entomology, 



AND 



W. F. FISKE, 



In Charge, Gipsy Moth Parasite Laboratory, 

 Melrose Highlands, Mass. 



Issued July 29, 1911. 



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WASHINGTON : 



GOVERNMENT PRINTING OFFICE. 



1911. 



