Plectris ruficollis is a species of beetle of the family Scarabaeidae. It is found in Brazil (Mato Grosso).
Adults reach a length of about 10âÂÂ11 mm. The upper surface, pronotum and scutellum are light reddish-brown, while the elytra are dark reddish-brown and shiny. The pygidium, underside and legs are also light reddish-brown, the antennae are yellowish-brown and the pronotum and elytral margins have yellowish cilia.