CICADELLOIDEA — lASSIDAE d 



varieties are catalogued under the first designation regardless of its 

 form. Some of these varieties may prove to be valid species with fur- 

 ther study and then may be given latinized designations. 



Primary homonyms of species have been replaced by nomina nova; 

 secondary homonyms have been restored to their original names if the 

 homonymy has been relieved by moving one or the other, or both, 

 species to other genera. 



All specific endings have been modified to agree with the suggestions 

 made by Blackwelder 1940, Journal of the Washington Academy of 

 Sciences 31: 135-140. There are certain disadvantages inherent in 

 this method, but it seems to the writer that these limitations are out- 

 weighed by the advantages of the system. We are confronted by so 

 many coined words that can have no gender that it seems better to 

 use this system and disregard apparent violations of Latin and Greek 

 grammar. Where the gender of generic names can be determined, the 

 appropriate adjustments are made in the specific names. 



In a detailed catalogue such as this, it is practically impossible to 

 eliminate all errors. We will appreciate it very much if our attention 

 is directed to all such mistakes. It is especially easy to overlook lists 

 published in the proceedings of local natural history societies, refer- 

 ences to species of economic importance published in scientific agri- 

 cultural journals, references to vectors of plant diseases published 

 in phytopathological journals, and other references of a similar nature. 

 It will be very much appreciated if authors will send us reprints of all 

 articles dealing with the Homoptera. Also, it would seem that no 

 changes in the nomenclature adopted in this catalogue should l^e made 

 in the future withoiit a full explanation. 



All literature available to the writer before December 31, 1955, has 

 been included in this catalogue. 



The present catalogue of the Family lassidae is the fifteenth part 

 of the Cicadelloidea. This w^as virtually complete at the time of the 

 death of Dr. Z. P. Metcalf on January 5, 1956. It was completed with 

 the aid of Miss Virginia Wade, research analyst. North Carolina State 

 University, who worked with Dr. Metcalf for 7 years, and the teclinical 

 advice of Dr. David A. Young, North Carolina State University, and 

 Dr. W. H. Anderson, Insect Identification and Parasite Introduction 

 Research Branch, Entomology Research Division, U.S. Department 

 of Agriculture, Beltsville, Md. Miss Emily Bennett, formerly Librar- 

 ian of the Division of Insects, U.S. National Museum, was extremely 

 helpful in locating certain references needed for the catalogue. The 

 higher categories utilized in this classification are those decided upon 

 by Dr. Metcalf during his work on the catalogue. 



In this part of the catalogue a method of literature citation has 

 been adopted which differs from that used in the catalogues of the 



