Introduction 
Vll 
In the present number of this series we have departed from our previous 
method of giving latinized names to varieties which in the past have been 
designated by Arabic letters, Greek letters, numbers, or other designations. 
All varieties are catalogued, however, under the first designation regardless 
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Primary homonyms of species have been replaced by nomen nova; 
secondary homonyms have been restored to their original names if the 
homonym 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 Black welder 1940, Journal of the Washington Academy of Sci¬ 
ences 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 of this system. We are confronted by so many coined words 
that can have no sex that it seems better to use this system and disregard 
apparent violations of Latin and Greek grammar. Thus the Greek word 
Tettix , although masculine in origin, is treated in its various combinations 
as feminine because they end in x. 
In a detailed catalogue such as this it is practically impossible to elim¬ 
inate all errors. The author will appreciate it very much if his attention is 
directed to all such mistakes. It is especially easy to overlook local lists 
when published in the proceedings of local natural history societies, refer¬ 
ences to species of economic importance when published in scientific agri¬ 
cultural journals, references to vectors of plant diseases when published in 
phytopathological journals, and many other references of a similar nature. 
It will be very much appreciated if authors will send me reprints of all 
articles dealing with the Homoptera Auchenorhyncha so that this material 
may be included in future catalogues to make them as complete as possible. 
Also it would seem to the author that changes in the nomenclature adopted 
in this catalogue should not be made in the future without a full explanation. 
All literature available to the writer before December 31, 1953 has been 
included in this catalogue. 
Z. P. Metcalf 
Raleigh, North Carolina 
January 1954 
