Cyclocephala marquezi Delgado and Mora-Aguilar, new species, from the tropical dry forest of the state of Veracruz, Mexico, is described and illustrated. Cyclocephala monzoni Ratcliffe and Cave is recorded for the first time from Mexico. New Mexican state records are reported for Ancognatha manca LeConte, Cyclocephala alexi Ratcliffe and Delgado, Cyclocephala barrerai Martínez, Cyclocephala berti Delgado, Cyclocephala concolor Burmeister, Cyclocephala discolor (Herbst), Cyclocephala halffteriana Martínez, Dyscinetus laevipunctatus Bates, and Stenocrates laevicollis Kirsch.