Photo Douglas J. Emlen
Photo E. GreeneThe name of this male unusual stag-horned beetle could be Proagoderus rangifer (or Onthophagus rangifer), which is species in Tribe Onthophagini, Subfamily Scarabaeinae, Family Scarabaeidae. It is about 11 mm length. Closely relative beetles can be found in Europe as well, but dark coloured.
Source: Douglas J. Emlen - Division of Biological Sciences UM, Whyfiles