Proceedings of 
the United States 
National Museum 
SMITHSONIAN INSTITUTION + WASHINGTON, D.C. 
Volume 113 1962 Number 3456 
THE WEEVIL GENUS SMICRONYX IN AMERICA 
NORTH OF MEXICO 
(COLEOPTERA: CURCULIONIDAE) 
By Donatp M. Anperson ' 
Introduction 
The species of the genus Smicronyx occurring in North America 
north of Mexico were last revised in 1894 by W. G. Dietz. Since 
that time the efforts of numerous collectors have brought thousands 
of specimens of Smicronyx and a great deal of information into various 
museums. Unfortunately, the revision by Dietz has proved very 
inadequate either for determining and arranging that material or for 
use as a basis for more detailed studies of the various species and 
groups of species with respect to their relationships and limits. He 
did not designate type specimens for any of the species; the identity 
of some species was not clear because the types were not studied; 
and no information on the biology was provided. Moreover, a 
number of scattered papers containing descriptions of new species 
or information on described species have been published since Dietz’s 
revision. 
The purpose of the present study is to correct and complete the 
work of the past, to assemble the more recent published information, 
1 This paper is based on a thesis submitted in 1958 to the Graduate School of Cornell University in partial 
fulfillment of the requirements for the degree of Doctor of Philosophy. The preparation of the manuscript 
was aided by a State University of New York Summer Research Fellowship. 
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