NS ae 
UsS; DEPAREMENT OF AGRICULTURE, 
BUREAU OF ENTOMOLOGY— BULLETIN No. 80, Part VI. 
L. O. HOWARD, Entomologist and Chief of Bureau. 
PAPERS ON DECIDUOUS FRUIT INSECTS 
AND INSECTICIDES. 
LIFE HISTORY OF THE CODLING MOTH 
IN NORTHWESTERN PENNSYLVANIA. 
BY 
A. G. HAMMAR, 
Engaged in Deciduous Fruit Insect Investigations 
IssuED NOVEMBER 28, 1910. 
2\SAS1 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE, 
1910, 
