INTRODUCTION V 



Primary homonyms of species have been replaced by nomina 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 

 outweighed 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 mth 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 AgaUiidae is the fourteenth 

 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 Universit}^, who worked with Dr. Metcalf for 7 years, and the 

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

 sity, and Dr. W. H. Anderson, Insect Identification and Parasite Intro- 

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

 Department of Agriculture, Beltsville, Md. Miss Emily Bennett, for- 

 merly Librarian of the Division of Insects, U.S. National Museum, was 

 extremely helpful in locating certain references needed for the cata- 

 logue. 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 literatiu-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 

 letter, e.g., Fabricius 1802a. The full reference can be obtained by 

 considting the Bibliography of the Cicadelloidea, in which authors are 

 arranged alphabetically, and their works chronologically under the 

 author's name. This method eliminates the necessity for a complete 



