VI 
Introduction 
generic, specific or other groups are compared. All references have been 
checked against the original save those marked with an asterisk (*), which 
have been accepted from reliable sources. Every effort has been made to 
have the references full and complete and to give an indication of the 
character of the data contained. Where the writer knows that reprints 
have been issued with different pagination, this is indicated in parentheses 
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 pub¬ 
lished these have been indicated by separate references. Genera established 
without included species have been dated from their original description, 
with their type fixation dated at the time of the first inclusion of species. 
Original spellings have been retained in all cases, except obvious typo¬ 
graphical errors. Typographical errors are indicated by placing “[sic]” 
after the misspelled name. 
The determination of obvious typographical errors is not always easy. 
These errors range all the way from clearly apparent transpositions of 
letters, to misspelled names of individuals, geographical names, and many 
others of like character. However, 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, 
Neokolla and Keonolla , or Alebra , Elebra, 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 with¬ 
out recourse to the index, which will be published at the completion of the 
Fascicle, together with the full bibliography. 
The writer takes no pride in the authorship of nomen 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 authorities at the present 
time. Doubtful genera and species have been included 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 nomenclature than 
the tendency to evaluate references from previous decades in the light of 
present day practices and procedures. 
