THE ENTOMOLOGICAL CODE. 23 



use for one group of insects, as Physapoda and Thysanoptera for 

 thrips, or Siphonaptera and Aphaniptera for fleas, the earlier should 

 be used. 



Status of Invalid Names. 



118. If an author publishes a manuscript name, or any other 

 name that is invalid, such name may be adopted later by any author 

 for any purpose, and it will date from the first valid usage, and be 

 credited to the validating author, no matter in what sense used. 



Example. — Alpha alba Smith 1834, MSS. does not preoccupy 

 Alpha alba Jones 1867. Likewise the generic name Beta Smith 

 1834 without included species does not preoccupy Beta Jones 1867 

 validly established. 



RECOMMENDATIONS. 



119. Reprints should always bear the name and volume of the 

 publication and the original pagination. 



Titles should indicate the Order or Family, preferably both, to 

 which the insects discussed belong, and if the article treats of the 

 fauna of one general region that fact should also appear in the title. 



Follow some plan in making descriptions, segregate the matter 

 relative to one part or pertaining to the color, &c. Comparative 

 notes relative to an allied species in the same genus, where sue!) 

 occurs, is recommended. 



A new' genus or species should be clearly indicated as such ami 

 should be noticeably set off in position or type, not obscurely pro- 

 posed in the midst of a paragraph or other inconspicuous position. 



A description should be given separately for each new genus mil 

 species and their types indicated. 



When descriptions of new genera or species are given in languaj 

 other than Latin, German, French or English it is well to include a 

 diagnosis in Latin. 



New species should not be based on the early stages, dot on the 

 work of insects. 



Do not make overlong descriptions nor titles. 



In describing new species a figure, especially of distinguishing 

 characters, should be given. 



The Metric system of measurements should he used in all scientific 



works. 



A name should be euphonious, and of moderate length. Hybrid 

 names should be avoided. 



