Two new species of the Onthophagus clypeatus species group (Coleoptera: Scarabaeidae: Scarabaeinae)

摘要

Two new species of Onthophagus from Oaxaca, Mexico, are described and illustrated: Onthophagus istmenus new species, and Onthophagus santamariensis new species. Keys for separating major males of the new and allied species are presented. Taxonomic remarks are commented for the new and closely related species.