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CICADELLOIDEA — GYPONIDAE S 



All specific endings have been modified to agree with the sugges- 

 tions 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 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 local 

 lists published in the proceedings of local natural history societies, 

 references to species of economic importance published in scientific 

 agricultural journals, references to vectors of plant diseases published 

 in phytopathological journals, and many other references of a similar 

 nature. It will be very much appreciated if authors will send us re- 

 prints 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 Gyponidae is the third part of 

 the Cicadelloidea. This was virtually complete at the time of the 

 de*ath of Dr. Z. P. Metcalf on January 5, 1956. It was completed with 

 the aid of Miss Virginia Wade, Research Analyst, North Carolina 

 State College, who worked with Dr. Metcalf for 7 years, and the tech- 

 nical advice of Dr. David A. Young, Jr., North Carolina State College, 

 and Dr. P. W. Oman, formerly with the Insect Identification and Par- 

 asite Introduction Research Branch, Entomology Research Division, 

 U.S. Department of Agriculture, Beltsville, Md. The higher cate- 

 gories 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 

 fulgoroid families. This change has been instituted to save time, 

 space, and publication costs. It is believed that the revised method 

 will cause no great inconvenience to the reader. Dr. Metcalf himself 

 advocated it under certain conditions, and it is felt that its use would 

 have met with his approval for his catalogues. 



Under the system used here, and to be used for subsequent portions 

 of the Cicadelloidea catalogue, the literature references are cited by 

 author, year, and key letter, e.g., Fabricius 1802a. The full reference 

 can be obtained by consulting the Bibliography of the Cicadelloidea 

 in which authors are arranged alphabetically, and their works chrono- 



