A review of the flightless genus Nanotermitodius Howden, 2003 (Coleoptera: Scarabaeidae: Aphodiinae: Rhyparini).

The genus Nanotermitodius Howden, 2003 (Coleoptera: Scarabaeidae: Aphodiinae: Rhyparini) is reviewed and a new species described. Only two species are presently known in the genus, Nanotermitodius andersoni Skelley, Smith, & Mora-Aguilar, new species, and Nanotermitodius peckorum Howden, 2003, which both occur in Oaxaca, Mexico. A key and distribution map for the species are presented.

A new Mexican species of Onthophagus Latreille (Coleoptera: Scarabaeidae: Scarabaeinae), with a revised key to the species of the O. dicranius species complex.

New World species of the genus Onthophagus Latreille (Coleoptera: Scarabaeidae: Scarabaeinae) have been classified in different ways, all of them without a phylogenetic framework. For instance, Boucomont (1932) separated them in 13 groups of species, but Zunino Halffter (1988; 1997) only recognize five species groups. Howden Gill (1993) add the O.

A new Mexican species of Rhyparus Westwood (Coleoptera: Scarabaeidae: Aphodiinae), with new records and a key to the Mexican and Guatemalan species.

In this paper we describe Rhyparus chimalapensis new species (Coleoptera: Scarabaeidae: Aphodiinae: Rhyparini), from the region of Chimalapas, Oaxaca, Mexico. New records are given for three species of Rhyparus Westwood from Mexico and Guatemala. A key to the Mexican and Guatemalan species of this genus is included.

A new Mexican species of Chrysina Kirby (Coleoptera: Scarabaeidae: Rutelinae), with nomenclatural changes, new records, and a key to the C. quiche species group.

Chrysina chimalapensis new species (Coleoptera: Scarabaeidae: Rutelinae: Rutelini), from the region of Chimalapas, Oaxaca, Mexico is described and illustrated. A key to the species of the C. quiche species group is included.