Tetraserica hilaris is a species of beetle of the family Scarabaeidae. It is found in India (Arunachal Pradesh).
Description Adults reach a length of about 7.3 mm. They have a reddish brown, oval body. The antennae are yellowish. The dorsal surface is mostly dull and very sparsely setose.
Etymology The species name is derived from Latin hilaris (meaning bright or cheerful).
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