Technical Series, No. 17, Part II. 



U. S. DEPARTMENT OF AGRICULTURE, 



BXIRE^TJ Om ElSrTO]VIOIL.O&Y. 



■ L. 0. HOWARD, Entomologist and Chief of Bureau. 



CONTRIBUTIONS TOWARD A MONOGRAPH OF 

 THE SCOLYTID BEETLES. 



11. PRELIMINARY CLASSIFICATION OF THE 

 SUPERFAMILY SCOLYTOIDEA. 



A. D. HOPKINS, Ph. D., 



In Charge of Forest Insect Investigations. 



Issued January 9, 1915. 



WASHINGTON: 



eOVERNMENT PRINTING OFFICE. 



1915. 



