On the nomenclature of <Emphasis Type="Italic">Colias nastes mongola</Emphasis> Alphéraky, 1897 and <Emphasis Type="Italic">Colias tamerlana</Emphasis> Staudinger, 1897 (Lepidoptera,Pieridae)

The nomenclatural history of the nominal taxa Colias nastes mongola Alphéraky, 1897 and Colias tamerlana Staudinger, 1897 is considered. The nominal taxon Colias nastes mongola Alphéraky, 1897 was published before the end of June 1897, whereas the nominal taxon Colias tamerlana Staudinger, 1897 was published on July 27, 1897. Consequently, the combination Colias tamerlana mongola Alphéraky, 1897 contradicts Art. 23 of the International Code of Zoological Nomenclature and should not be used. Analysis of collection material and publications of different authors, including the travel notes of H. Leder, allowed us to determine the exact type locality of the nominal taxon Colias nastes mongola Alphéraky, 1897, which is the vicinity of the village of Turan (Tunkin District, Buryatia, the Russian Federation), with the approximate geographic coordinates 51°38′N and 101°39′E.