We examined the diets of 43 juveniles of the lizard Uma exsul from Coahuila, Mexico. The diet was composed primarily of adult and larval beetles. The diets of two females collected at the same time and place as the juveniles included beetles as the most important item but hemipterans, ants, and other hymenopterans were also important. Our observations suggest that the differences between the diets of juvenile U. exsul in this study and adult U. exsul in another study likely reflect both local abundances of prey and ontogenetic changes.