GENERIC NAMES OF BUTTERFLIES 17 



by Hubner in his various works and by Doubleday in his " Genera ", eliminated two 

 causes of confusion of a purely bibliographical nature which had for long seriously 

 impeded the work of lepidopterists. 



VI. FORM OF ENTRY VDOPTED 



Two points regarding the form of entry adopted call for brief notice, 

 (a) Abbreviation of titles 



For every name published in a serial publication, the abbreviation adopted in 

 citing that serial is that laid down in the " World List of Scientific Periodicals ", 

 the 3rd edition of which records the titles of periodicals published in the period 

 1900-1950. In the case of names published in other serials not listed in the above 

 volume, the titles are abbreviated in accordance with the principles adopted in the 

 " World List ". In some cases it has been found possible, by combining elements in 

 the abbreviations adopted in the " World List " for the titles of two or more serials 

 having somewhat similar titles, to devise a form of abbreviation identical in type 

 with that adopted in the " World List ". In the case of serials bearing titles for 

 which no near analogy can be found, abbreviations have been devised on lines in 

 harmony with those that one might have expected to find in the " World List ". 



The abbreviation of the titles of separate works is more difficult than that of the 

 titles of serials, there being in this case no external guide such as the " World List ". 

 In the abbreviations here adopted for such works the aim has been to secure uni- 

 formity and intelligibility. Many separate works bear titles containing words that 

 appear also in the titles of other works, e.g. words used to denote particular zoo- 

 geographical regions and explanatory words such as " Introduction ", " Beitrag " 

 and the like ; for all such words a uniform method of abbreviation has been adopted. 

 As regards intelligibility, experience has often shown that the titles as commonly 

 cited in standard works are abbreviated in so compressed — and therefore so incom- 

 plete — a form that, unless the reader is already familiar with the work concerned, its 

 identification in library catalogues is a matter of considerable difficulty. To over- 

 come this, the form of abbreviation here adopted for the citation of the titles of a 

 considerable number of separate works is fuller that that usually employed. Simi- 

 larly, it often happens that important works forming contributions to some larger 

 work — for example, some large faunistic work or the report of some widely based 

 Expedition — are cited in such a way that the identification of the volume concerned 

 is a matter of difficulty. In such cases the subsidiary Section Number, Teil Number 

 or the like has been inserted in the abbreviation here adopted. In addition, in such 

 cases, the name of the general editor or principal contributor has been added to the 

 title cited, it being under the name of that author that the entire work is most 

 commonly found in library catalogues. 



There is a considerable number of important contributions to the literature, 

 which, though published in some serial, are habitually cited by their own titles as 

 though they had appeared as separate works. A striking example of this incon- 

 venient and misleading method of citation is provided by a very important work 



