Trioserica lilongensis is a species of beetle of the family Scarabaeidae.Checklist of Tribe Sericini Hope, 1837 for Central China It is found in China (Fujian, Guangdong, Hongkong).
Description Adults reach a length of about 6.6–7.4 mm. They have a yellowish brown, oblong body, with yellow antennae. The dorsal surface has small or larger dark spots and is moderately dull and almost glabrous.
Etymology The species is named after its type locality, Lilong.
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