New species of Phyllophaga Harris in the subgenera Phyllophaga (s.str.) and Phytalus Erichson are described from the montane cloud forests located at 1,900–2,300 m of altitude in the Biosphere Reserve Sierra de Manantlán, Jalisco-Colima, México. Phyllophaga (s.str.) sayloriana new species and P. (s.str.) manantleca new species are included in the “pubicauda” species group; P. (s.str.) joyana new species is included in the “xanthe” species group; P. (Phytalus) dugesiana new species and P. (Phytalus) jalisciensis new species are included in the “bucephala” species group. Drawings of male genital capsules, tarsal claws, and female genital plates of the new species are provided.