DIV. INSECTS, 



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 INSECTICIDES. 



1 



THE PEAR THRIPS. 



DUDLEY MOULTOI^, 



Engaged in Deciduous Fruit Insect Investigations. 



Issued June 10, 1907. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



190T. 



