Twelve new species of Phyllophaga subgenus Phytalus (Coleoptera : Melolonthidae) from eastern and southern Mexico

New species of Phyllophaga (Phytalus) are described from 28 Mexican localit ies as follows: P. soctona n. sp., P. yaxbitana n. sp., P. lineatoides n. s p. and P. itsmica n. sp. from northern and southeastern mountains of Chiapa s; P. juquilana n. sp., P. lulaana n. sp., P. tejupana n. sp., P. solavegan a n. sp. and P. benexonana n. sp. from northern and southern mountains of O axaca; P. pameana n. sp. and P. tlanchinolensis n. sp. from the mountains o f San Luis Potosi and Hidalgo, and P. tajimaroana n. sp. from eastern mount ains of Michoacan. Most of these species are living in pine-oak forests loc ated between 1345 and 3160 m of altitude, but a few were collected in cloud forest (1470-1550 m) or deciduous tropical forests located at 700-900 m. D rawings of male genital capsules, female genital plates, tarsal claws and c lypeus are provided.