t I I 



Issued Aug. 15, 1917. 



U. S. DEPARTMENT OF AGRICULTURE, 



OFFICE OF THE SECRETARY. 



CONTRIBUTION FKOM THE BUREAU OF ENTOMOLOGY, L. O. HOWARD, CHIEF, 



IN COLLABORATION WITH THE FEDERAL HORTICULTURAL 



BOARD, C. L. MARLATT, CHAIRMAN. 



A MANUAL 



OF 



DANGEROUS INSECTS 



ilKELY TO BE INTRODUCED IN THE 



UNITED STATES THROUGH 



IMPORTATIONS. 



EDITED BY 



W. DWIGHT PIERCE, 



Entomologist, Southern Field Crop Insect Investigations 



WASHINGTON; 



GOVERNMENT PRINTING OFFICE, 



1918. 



