Euknemoplia lacroixi is a species of beetle of the family Scarabaeidae. It is found in Madagascar.
Adults reach a length of about . They are brownish-black, with the legs and antennae reddish-brown (although the antennal club is slightly darker). Most of the upper surface is covered with dark brownish scaly setae, but there are also white scales forming longitudinal lines.
The species is named in honour of French Coleopterist Marc Lacroix.