Generic Guide to New World Scarab Beetles - La Rue, D.A. (1986) A new species of from western Arizona (Coleoptera: Scarabaeidae: Rutelinae). 40: 145-147. Young, R.M. (2002) A new Burmeister taken on post oak in eastern Texas with notes and a key to species in the genus (Scarabaeidae: Rutelinae). 56: 473-479.