CICADELLOIDEA — APHRODIDAE 3 



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

 species with fm-ther study and then may be given latinized designa- 

 tions. 



Primary homonyms of species have been replaced by nomina nova; 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 Blackvvelder 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 

 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 oin- 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 references of a similar nature. It 

 will be very much appreciated if authors wiU 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. 



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

 been included in this catalogue. 



The present catalogue of the Family Aphrodidae is the eighth 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 College, who worked with Dr. Metcalf for 7 years, and the 

 technical advice of Dr. David A. Young, North Carolina State 

 College, and Dr. P. W. Oman, formerly in charge of the Insect Identi- 

 fication and Parasite Introduction Research Branch, Entomology 

 Research Division, Agricultural Research Service, U.S. Department 

 of Agriculture, BeltsviUe, Md. The higher categories utilized in this 

 classification are those decided upon by Dr. Metcalf dm-ing his work 

 on the catalogue. 



In this part of the catalogue a method of literatm-e citation has 

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

 fulgoroid families. References are cited by author, year, and key 



