Beckhoplia castanea is a species of beetle of the family Scarabaeidae. It is found in South Africa (Northern Cape). The habitat consists of Nieuwoudtville Shale Renosterveld.
Adults reach a length of about (males) and (females). Males are black with pale-brown elytra, sometimes with blackened outer margins. Females are also black, but with red-brown elytra, which also sometimes have blackened outer margins.
The recorded host plant is Bulbinella latifolia.
The species name is derived from Latin castane- (meaning brown) and refers to the colour of the elytra.