Identifying Dynastinae

New Species and Distributions of Neotropical Phileurini and a New Phileurine from Burma (coleoptera: Scarabaeidae: Dynastinae)

A new species of Amblyodus Westwood, 1878 (Coleoptera, Melolonthidae, Dynastinae) from South America

A second species of Amblyodus Westwood, 1878, Amblyodus castroisp. n., is described from the northern South America based on 12 specimens from Brazil and Peru (Amazonian subregion). The new species is here compared with the type species of the genus, Amblyodus taurus Westwood, 1878 and both species and their male genitalia are illustrated. Diagnostic characters for the genus are discussed, espe...

Revision of the genus Chalcasthenes Arrow (Coleoptera: Scarabaeidae: Dynastinae: Oryctoderini) from the Solomon Islands

The genus Chalcasthenes Arrow (Dynastinae: Oryctoderini), a scarab beetle genus endemic to the Solomon Islands, is reviewed. Based on examination of type specimens, the genus Strehlia Frey (Rutelinae: Rutelini: Parastasiina) is a new junior synonym of Chalcasthenes. The historical classification of these genera (either in the subfamily Dynastinae or Rutelinae) and character-based criteria for a...

Use of Horns in Fights by the Dimorphic Males of Ageopsis nigricollis (Coleoptera, Scarabeidae, Dynastinae)

Brief observations of the behavior of males of the dynastine beetle Ageopsis nigricollis suggest that the males use their horns as weapons in intraspecific fights. Mea surements of nearly 200 males show that there are two different morphs. Thoracic but not head horns are missing in the minor morph, and behavioral observations confirm that thoracic horns are less useful for smaller individuals. ...

New Combinations, Synonymy and Distribution Records for Neotropical Pentodontini and Oryctini (coleoptera: Scarabaeidae: Dynastinae)