Description of the larva of Onthophagus orpheus orpheus (Panzer) (Coleoptera: Scarabaeidae: Onthophagini)

The larva of Onthophagus orpheus orpheus (Panzer) is described here for the first time. Larvae were reared from adults collected in dung baited traps from central Wisconsin. The larva will key to the current couplet of O. oklahomensis Brown, O. pennsylvanicus Harold, and O. landolti Harold in Ritcher's (1966) key to U.S. Onthophagus. It can be separated from them by the amount of setae present on the gibbosity of the 3rd abdominal segment, amount of setae and shape of setal patches on the ventral pygidium, and the size of the head capsule of the mature larva.