U. S. D. A., B. E. Tech. Ser. 17, Pt. II. F. I. I., January 9, 1915. 



CONTRIBUTIONS TOWARD A MONOGRAPH OF THE 

 SCOLYTID BEETLES. 



II. PRELIMINARY CLASSIFICATION OF THE SUPERFAMILY 



SCOLYTOIDEA.'^ 



By A. D. Hopkins, Ph. D., 



In Charge of Forest Insect Investigations. 



INTRODUCTIOSr. 



The object of this contribution is to discuss the taxonomy and 

 present a preUminaiy classification of the families and subfamiUes 

 of tlie scolytoid beetles of the world. The discussion and classifi- 

 cation are based on a study of representatives of about 122 described 

 and undescribed genera and about 1,000 species of North America 

 and other countries, in the collections of the U. S. National Museum 

 and certain other museums and institutions of this country. 



The types of North American species described by Zimmermann, 

 LeConte, Fitch, Harris, Schwarz, Ulke, and, with a few exceptions, 

 those of other North American authors, have been studied by the 

 writer. Nearly all of the North American species described by 

 Eichhoff are represented in the U. S. National Museum collections 

 by specimens sent by him to the writer and to Dr. C. V. Riley. 

 Many of these specimens are from the type series not only of North 

 American but of many foreign species described by Eichhoff. Cen- 

 tral and South America, the West Indies, the Eastern Continent, 

 Austraha, and Oceania are represented to a greater or less extent 

 by described and undescribed species, of which 31 genera and 96 

 species are from Europe, principally from the collections of Eichhoff 

 of Germany, Blandford of England, and Villard of France. 



The material in the forest insect collections of the Bureau of 

 Entomology and the West Virginia Agricultural Experiment Sta- 

 tion, collected by the writer and his associates, includes nearly all 

 of the described North American species and in addition a large 



°^ See Hopkins, A. D. List of generic names and their type-species in the coleop- 

 terous superfamily Scolytoidea. Proc. U. S. Nat. Mus., vol. 48, No. 2066, pp. 115-136, 

 December 16, 1914. 



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