Characteristics
Antennal insertion visible from above. Pronotum narrower than elytra. Posthumeral elytral emargination absent. Mesepimeron usually not visible in dorsal view. Mesometasternal projection usually absent. Mesotibial apex with 2 spurs; spurs mesad, adjacent (not separated by basal metatarsal segment). Posterior coxae contiguous or nearly so. Protibia with 1-3 teeth (usually 2).

Classification Status
The tribe is divided into five subtribes; two subtribes are restricted to Africa (Platigeniina and Cryptodontina) while the Incaina is found only in the Neotropics. The remaining two subtribes (Osmodermina and Trichiina) are found in both the Old World and the New World, but not in Australia.

Distribution
In the New World there are 14 genera (Howden 1968; Krikken 1984).

New World Subtribes
Incaina
Osmodermina
Trichiina

TRIBE INCAINA
Characteristics: Procoxae projecting conically. Clypeus of male with horn-like process. Eye canthus angulate in front.

The subtribe Incaina was revised by Krikken (1984) to include four strictly Neotropical genera with about nine species. Key: Krikken 1984.

SUBTRIBE OSMODERMINA
Characteristics: Procoxae projecting conically. Pronotum in males with prediscal impression. Mandibles strongly sclerotized. Dorsum uniformly dark brown to black. Protibia tridentate. Body size greater than 15 mm.

The subtribe Osmodermina was redefined by Krikken (1984) to include only two genera: Osmoderma and Platygeniops. Osmoderma has nine species distributed in the Palearctic and Nearctic regions while Platygeniops includes only one Oriental species that is known only from female specimens.

SUBTRIBE TRICHIINA
Characteristics: Procoxae projecting conically. Pronotum evenly convex or with weakly impressed midline. Mandibles weakly sclerotized. Galea of maxilla usually penicillate. Protibia with 1-3 teeth. Dorsum usually bicolored or with cretaceous spots or bands or metallic or all of the above. Body size mostly smaller than 15 mm.

The Trichiina consists of 37 genera that are found nearly worldwide except Australia and Madagascar. Eight genera are found in the New World. Key: Howden 1968.

References Cited
HOWDEN, H. F. 1968. A review of the Trichiinae of North and Central America (Coleoptera: Scarabaeidae). Memoirs of the Entomological Society of Canada No. 54: 1-77.

KRIKKEN, J. 1984. A new key to the suprageneric taxa in the beetle family Cetonidae, with annotated lists of the known genera. Zoologische Verhandelingen No. 210: 1-75.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.