Philanthaxia lui is a species of beetle of the family Buprestidae. It is found in China (Hainan).

Description Adults reach a length of about 5.6 mm. They are green dorsally and bronze ventrally, with a metallic luster.

Etymology The species is named after Mr. Jiasheng Lu (Sanya, Hainan).Two New Species of the Genus Philanthaxia Deyrolle, 1864, from Hainan Province, China (Coleoptera, Buprestidae, Thomassetiini)

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