Some new and otherwise noteworthy species of Onthophagus Latreille from the Indo-Australian archipelago (Coleoptera: Scarabaeidae)

Five new species of the genus Onthophagus Latreille are described and figured: 0. calamophilus (New Guinea), gajo (Sumatra), sisyphoides (New Guinea), vethi (Sumatra), wiebesi (Luzon). Notes on other species concern: 0. bomberaianus Balthasar (new record; variation, figured), deflexicollis Lansberge (new to New Guinea), luctuosus Boucomont (new record; figured), melangensis Boucomont (lectotype designation).