The author’s involvement from 1934 in problems of odonate nomenclature is briefly described, and a plea is made to the Editors of entomological periodicals and to the authors of taxonomic papers to carefully affix the accurate date of appearance to their publications. Since 1934 1 have been closely involved with the Odonata nomenclature. In that year the Royal Entomological Society of London appointed a committee of six eminent British entomologists to prepare lists of specific names to be fixed as genotypes of genera of British insects. They delegated, to small sub-committees, the duty of discharging this task for the particular Orders or groups of Orders. They made the rules and principles that they asked us to adopt. They also selected the members of the different sub-committees.