PREFATORY NOTE. 



The attention of those consulting this Index is drawn to 

 the following points : — 



1. The number of the volume is given in heavy-faced 

 arabic type, of the page in light-faced type. Memoir 

 references are preceded by M. 



2. A reference to the original or to a fairly full descrip- 

 tion of a species or genus is followed by an asterisk. 



3. Where the genus is nom. mut., or where there has 

 been doubtful generic identification, the compiler has not 

 attempted to follow the latest or the correct usage, but has 

 indexed under whatever name appears in the text. It is, 

 therefore, advisable to consult the Index under the specific 

 title, as by running his eye down the list the reader can see 

 what generic synonyms are indexed. 



4. Where the genders of genera have required more than 

 one form of the specific name, the specific entry is made 

 under that form of the word which comes first alphabetically. 

 Thus the numerous genera having specific forms australis or 

 australe are arranged alphabetically under australe,-is. Like- 

 wise those having forms australicus , australica, or australicum 

 are arranged alphabetically under australica, -urn, -us. 



5. For specific proper names the ending i has been pre- 

 ferred to ii. 



6. Specific names, such as 18-rnaculata, will be found 

 in numerical order at the end of the Index, but they 

 have also been inserted in the body of the Index where the 

 name would be inserted if the prefix were written out in full 

 in English, e.g., 'sixteen'-maculata. 



7. Many obvious misspellings and misprints in the text 

 have been corrected, but no doubt not a few have been over- 

 looked. In certain cases, however, the compiler has not felt 

 himself at liberty to decide between conflicting forms. 



8. In all cases where a word is derived from Latin or 

 Greek the digraphs se and ce have been printed as two letters, 

 following the usage of the Oxford University Press. 



9. Several references omitted from the Index to Vols. I- 

 XXIV . have been brought under the notice of the compiler. 

 These will be found at the end of this Index. 



