U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF ENTOMOLOGY- BULLETIN No. 68, Part L 



L. O. HOWARD. Entomologist and Chief of Bureau. 



PAPERS ON DECIDUOUS FRUIT INSECTS 

 AND INSECT'ICIDES. 



THE PEAR TIIRIPS. 



DUDLEY MOULTOE", 



Engaged in Decidnous Fi-uit Insect Investigations. 



Issued June 10, 1907. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 



1907. 



