Serica pilumna is a species of beetle of the family Scarabaeidae. It is endemic to western Arunachal Pradesh.
Description Adults reach a length of about 10.4 mm. They have a dark brown, oblong body. The antennae are yellowish and the legs, elytral striae and borders of the pronotum are reddish brown, the elytra with dark spots. The dorsal surface is dull and densely covered with erect setae.
Etymology The species name is derived from Latin pilumnus (meaning setose) and refers to the densely setose surface.
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