Ten new species in the Phyllophaga Harris subgenus Cnemarachis Saylor (Coleoptera: Scarabaeidae: Melolonthinae: Melolonthini) were discovered during a May 2013 field expedition in Cuba. These new species are Phyllophaga (Cnemarachis) andersoni Smith and Paulsen, Phyllophaga (Cnemarachis) bretti Smith and Paulsen, Phyllophaga (Cnemarachis) calai Smith and Paulsen, Phyllophaga (Cnemarachis) deleri Smith and Paulsen, Phyllophaga (Cnemarachis) falcata Smith and Paulsen, Phyllophaga (Cnemarachis) holguinensis Smith and Paulsen, Phyllophaga (Cnemarachis) manibota Smith and Paulsen, Phyllophaga (Cnemarachis) perfidia Smith and Paulsen, Phyllophaga (Cnemarachis) sarlacca Smith and Paulsen, and Phyllophaga (Cnemarachis) secessicola Smith and Paulsen. Each species is described, illustrated, and diagnosed. A checklist of the species of Phyllophaga in Cuba by province is given.