THE ENTOMOLOGICAL CODE. 7 



14. Additions or corrections given in one part of an article or 

 work to matter on a previous page of that same article or work are 

 admissible only when published on the same date. 



Example. — On page 41 an author makes a new genus, Alpha for 

 a single species, alba n. sp. On page 105 he adds a second species, 

 X. nigra Jones, to the genus. Alpha is then not monobasic unless it 

 is shown that page 41 was published before page 105. 



15. The date of a publication is the date of its first distribution. 

 The date of a work published in parts is the date of first distribution 

 of each part. In cases where the date of distribution is not given in 

 or on the publication an approximate date may be accepted until a 

 more definite date is known. There are a number of ways in which 

 such approximate dates may be obtained, such as the date of first 

 reception of the publication at some learned society or public institu- 

 tion, the review of the publication in other works, etc. Dates shown 

 to be false shall be corrected. 



16. If reprints are distributed in advance of the distribution of 

 the general article or volume, they become separate publications, and 

 date from such distribution, if otherwise conformable to the rules. 



PRIORITY. 



17. The law of priority applies to all generic names, and ones of 

 lower grade, published since January 1, 1758, the assumed date of 

 publication of the 10th edition of Linnaeus' Systema Naturse. No 

 name, binomial or otherwise, published before this date has any 

 standing whatever in entomological nomenclature. 



18. In case two conflicting names occur in the same work, the one 

 on the earlier page shall have precedence over that on the later page; 

 if both appear on the same page, the one coming first on that page 

 shall have precedence. 



19. In case two conflicting names are published in separate works 

 in the same year or the same month, and no evidence is obtainable 

 of a more definite date, page precedence shall obtain until more ac- 

 curate dates are determined. 



20. In case two conflicting names are published in separate publi- 

 cations on the same day, no account of longitude nor hour shall be 

 taken, but absolute page and line precedence shall obtain. 



