Pachyserica gracilis is a species of beetle of the family Scarabaeidae. It has been recorded from Kumaon and the Nepal Himalaya (including the Darjeeling area).
Adults reach a length of about 7.4-8.3 mm. They have a dark brown, elongate-oval body, but reddish-brown in some areas or with a greenish sheen. The antennae are yellowish-brown and the dorsal surface is dull with white hairs and erect, long, thin setae.
The species name is derived from Latin gracilis (meaning slim).