X Preface. 



ration of the Catalogue, these will be acknowledged in the preface to 

 that Catalogue, but I do wish here to express my appreciation of the 

 assistance I have received in the compilation of this Check List. I 

 am especially indebted to Prof. C. W. Woodworth who has very 

 kindly atTorded me facilities for the more rapid completion of the List, 

 Dr. E. D. Ball has very kindly turned over to me his personal list of 

 the CicadellidK from which I obtained many valuable hints regarding 

 the arrangement of the species in some of the larger genera, and to 

 Mr. W. T. Davis whose interest and assistance has made possible the 

 publication of the List at the present time I feel that more par- 

 ticular acknowledgments are due. 



A few features of the List should perhaps be noted here: 

 Species are numbered serially throughout the list. 

 Varieties have a letter added to the species number. 

 Synonyms are set in oblique type. 

 Manuscript names are enclosed in square brackets. 

 Parentheses about the name of the authority for family names indi- 

 cate that the author established the name with a different spelling 

 or termination. 

 Parentheses about the name of the authority for a species name indi- 

 cates that the species was described under another genus than that 

 used in this List. 

 Fractional numbers given the species added at the end of the List in- 

 dicate their proper location in the body of the work. 

 This List enumerates 699 genera and 2969 species. 



Edw.\rd Payson Van Duzee. 

 Univer-sitv of Californi.\, 

 April 24, 1916. 



