Most studies focus on damage caused by beetle larvae to various crops; however, little is known about the association of adults with wild and ornamental species, their food preferences, and plant-beetle relationships. Therefore, the objective of this work was to report new host plants and floral associations for four species of Cetoniinae and Rutelinae beetles (Coleoptera: Scarabaeidae) and to provide a checklist of Scarabaeidae from San Andrés Huayapam, Oaxaca, México. The checklist had 15 species grouped into 12 genera, nine tribes, and four subfamilies. Twelve species had new locality records, of which one was the first accurate distribution record for the State of Oaxaca.