CICADELLOIDEA — TETTIGELLIDAB 3 



less of its form. Some of these varieties may prove to be valid 

 species with fm'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Primary homonyms of species have been replaced by nomina nova; 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. We are confronted by so many coined 

 words that can have no gender 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 ad- 

 justments 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 joiu*nals, references to vectors of plant diseases published in 

 phytopathological journals, and 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 be made in the 

 future without 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 Tettigellidae is the first part 

 of the Cicadelloidea. This was 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 

 of the University of North Carolina at Raleigh, who worked with 

 Dr. Metcalf for 7 years, and the technical advice of Dr. David A. 

 Young, North Carolina State, and Dr. W. H. Anderson, Insect Identi- 

 fication and Parasite Introduction Research Branch, Entomology 

 Research Division, U.S. Department of Agriculture, BeltsviUe, Md. 

 Miss Emily Bennett, formerly Librarian, Division of Insects Branch 

 Library, Smithsonian Institution, 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 



