S. Mahunka szerk.: Folia Entomologica Hungarica 62. (Budapest, 2001)

restricts available names to those on the List, even if other names are later found to have been validly published. To our knowledge, there are presently no Lepidoptera names on the List of Available Names in Zoology. Fig. 1. Cover of Kluk (1780), reproduced from Pacit (1955) Fig. 2. Cover of Kluk (1780), from Instytut Zoologii, Uniwersytct Jagicllonski, Krakow, Poland Hemming (1954), in his application to the ICZN that resulted in Opinion 278, stated that "to place on the Official List the name which under the Règles is the oldest available name for the genus concerned represents the most effective way of recording the view of the Commission that that name and no other should be used for that genus". This statement was made by Hemming in his capacity as Secretary to the ICZN, but, unfortunately, was incorrect because generic names placed on the Official List are available (Article 80.6.1) but still subject to the usually rules of priority should an older name exist (Article 80.6.4). Hemming's incorrect statement may have resulted in subsequent interpretation that Plebejus Kluk, 1802 is not subject to the normal principle of priority in zoological nomenclature (Article 23.1). However Hemming's interpretation was unfortunate, because "An Opinion applies only to the particular case before the Commission and is to be rigidly construed; no conclusions other than those expressly specified are to be drawn from it" (Article 80.5). Hemming's statement may have resulted in most authors ignoring Paclt (1955) when he documented that Kluk (1802) was the second edition of the book (Figs 1, 3), a fact that was apparently unknown to Hemming and the rest of the ICZN at the time of publication of Opinion 278. Paclt documented that the first edition was Kluk (1780), and used the spelling Plebeius, rather than Plebejus.