A new species of the genus Phengaris (s. str.) (Lepidoptera, Lycaenidae) from China.

A new species of the genus Phengaris Doherty, 1891 (s. str.), namely Phengaris chloe sp. nov., has been discovered in Wuyi Mountain National Park, E. China. This species is markedly different from the other members in the genus Phengaris Doherty, 1891 (s. str.) and can be identified by the following characteristics: Forewing without markings in the distal of space CuA1 and CuA2, the marginal marking of underside wings weaker than other species in this genus and the distinct short protuberance at distal of valve. Photographs of adults and male genitalia are provided. A key to the Phengaris (s. str.) species based on wing pattern and male genitalia morphology is presented.