Plectris mandli is a species of beetle of the family Scarabaeidae. It is found in Brazil (EspÃÂrito Santo).
Adults reach a length of about 19 mm. They are dark brown and dull. The clypeus has a few erect, shorter setae, while the rest of the head, pronotum, elytra and scutellum are evenly, but not very densely, covered with appressed, pale, medium-length setae. The underside is covered with fine, appressed hairs, which are considerably longer than the setae on the upper side.