2 GENERAL CATALOGUE OF THE HOMOPTERA 



following the page numbers of the original. In a few cases, where 

 the matter has been reprinted under a different title with different 

 pagination, separate references are given. Where authentic editions 

 have been republished, these have been indicated by separate refer- 

 ences. Genera established without included species have been dated 

 from their original description, with their type fixation dated at the 

 earliest time the action can logically be interpreted to have occurred. 

 Original spellings have been retained in all cases, except obvious typo- 

 graphical errors. Typographical errors are indicated by placing 

 "[sic]" after the misspelled name. This is not for the purpose of 

 calling attention to the mistakes authors have made but to make cer- 

 tain that students following the catalogue have a clear understanding 

 of what is implied. 



The determination of typographical errors is not always easy. 

 These errors range from clearly apparent transpositions of letters, to 

 misspelled names of individuals, geographical locations, et cetera. 

 So many generic names have been formed by the transposition and 

 substitution of letters that one is often at a loss to know which names 

 are misspelled and which are not ; for example, NeohoUa and Keonolla^ 

 or Alehra^ Elabra^ and Eualebra. 



All variations in spelling save those which refer to endings only 

 are appropriately cross-referred. The species have also been listed 

 under every known generic combination so that it is possible to find 

 any species without recourse to the index, which will be published at 

 the completion of the Fascicle. 



The writer takes no pride in the authorship of nomina nova. He 

 uses them only when he thinks they are necessary. No new names 

 are proposed for species or genera described by living authors without 

 first giving the original author an opportunity to correct primary or 

 secondary homonyms. 



A catalogue is not a revision of a group, and the location of the 

 genera and species in the present catalogue is merely an attempt to 

 reflect what is believed to be the general consensus of the best authori- 

 ties at the present time. Doubtful genera and species have been in- 

 cluded to call them to the attention of subsequent revisers. 



An attempt has been made throughout this catalogue to interpret 

 all references in the light of the period in which they were published. 

 This is not always easy and leads perhaps to erroneous conclusions 

 at times, but it is certainly much sounder from the standpoint of no- 

 menclature than the tendency to evaluate references from previous 

 decades in the light of present-day practices and procedures. 



In this series we have departed from our previous practice of giving 

 latinized names to varieties which in the past have been designated by 

 Arabic letters, Greek letters, numbers, or other designations. All va- 

 rieties are catalogued, however, under the first designation regardless 



