CICADELLOIDEA COELIDIIDAE 6 



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

 further 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Primary homonyms of species have been replaced by nomina nova; 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 these hmitations are outweighed 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 our attention is 

 directed to all such mistakes. It is especially easy to overlook 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 phyto- 

 pathological 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 hterature available to the writer before December 31, 1955, has 

 been included in this catalogue. 



The present catalogue of the Family Coelidiidae is the eleventh 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. 

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

 N.C. State, and Dr. W. H. Anderson, Insect Identification and Par- 

 asite Introduction Research Branch, Entomology Research Division, 

 Agricultural Research Service, U.S. Department of Agriculture, Belts- 

 ville, Md. Miss Emily Bennett, formerly Librarian of the Division of 

 Insects, U.S. National Museum, was extremely helpful in locating 

 certain references needed for the catalogue. The higher categories uti- 

 Hzed 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. References are cited by author, year, and key letter, e.g., 



