The family consists of over 30,000 species with worldwide distribution. They are often called scarabs or scarab beetles. The classification within the family has undergone significant change in recent years, with several subfamilies elevated to family status, while other have been reduced to lower ranks.

In general, scarabs are stout-bodied beetles, many with bright metallic colours, measuring between 1.5–160mm. They have distinctive, clubbed antennae composed of plates that can be compressed into a ball or fanned out like leaves to sense odours. Many species are fossorial, with legs adapted for digging. In some groups, males (but sometimes females) have prominent horns on the head and/or pronotum to fight over mates or resources. 

The C-shaped larvae, are pale yellow or white. Most adult beetles are nocturnal, although the flower chafers (Cetoniinae) and many leaf chafers (Rutelinae) are active during the day. Their larvae live underground or under debris, so are not exposed to sunlight. Many scarabs are scavengers that recycle dung, carrion, or decaying plant material. 

Source: Wikipedia

Subfamily Cetoniinae

Tribe Cetoniini

Gametis jucunda var. sanguinalis
(Doi Inthanon, Thailand)
Glycyphana pygmaea
(Singapore)
Protaetia acuminata
(Singapore)

Tribe Cremastocheilini

Clinterocera cyprilrusi
(Sabah, Malaysia)

Tribe Taenioderini

Ixorida pseudoregia
(Singapore)
Pseudochalcothea spathulifera
(Sabah, Malaysia)
Taeniodera monacha
(Singapore)

Tribe Trichiini

Paratrichius siamicus
(Doi Inthanon, Thailand)

Subfamily Dynastinae

Tribe Cyclocephalini

Ancognatha vulgaris
(Sumaco, Ecuador)
Ancognatha sp. 0F1A5386
(Sumaco, Ecuador)
Ancognatha sp. 0F1A8141
(Sumaco, Ecuador)

Tribe Dynastini

Chalcosoma atlas ssp. keyboh (Male)
(Sabah, Malaysia)
Golofa sp. (Female) 0F1A9520
(Tandayapa, Ecuador)
Xylotrupes beckeri ssp. intermedius (Male)
(Sabah, Malaysia)
Xylotrupes pachycera (Male)
(Sabah, Malaysia)
Xylotrupes pauliani (Male)
(Sarawak, Malaysia)

Tribe Oryctini

Oryctes rhinoceros (Female)
(Singapore)
Trichogomohus sp. (Male) 0F1A3203
(Sabah, Malaysia)
Oryctini (Male) 0F1A3179
(Sabah, Malaysia)
Oryctini (Male) 0F1A6105
(Sabah, Malaysia)

Tribe Pentodontini

Bothynus lancifer (Male)
(Sumaco, Ecuador)

Subfamily Geotrupinae

Tribe Enoplotrupini

Enoplotrupes sharpi (Male)
(Doi Inthanon, Thailand)
Enoplotrupes sharpi (Female)
(Doi Inthanon, Thailand)

Subfamily Melolonthinae

Tribe Euchirini

Cheirotonus gestroi
(Khao Yai, Thailand)

Tribe Hopliini

Hoplia aurata
(Sabah, Malaysia)
Hoplia aurata
(Sabah, Malaysia)
Hoplia aurata
(Sabah, Malaysia)
Hoplia sp. 0F1A4899
(Sabah, Malaysia)
Hopliini 0F1A4420
(Sabah, Malaysia)
Hopliini 0F1A4869
(Sabah, Malaysia)

Tribe Leucopholini

Asactopholis pectoralis
(Sabah, Malaysia)
Exopholis sp. 0F1A3724
(Sabah, Malaysia)
Lepidiota stigma
(Sabah, Malaysia)
Leucopholini 0F1A0217
(Sarawak, Malaysia)
Leucopholini 0F1A1775
(Sabah, Malaysia)

Tribe Rhizotrogini

Phyllophaga marginalis
(Singapore)

Tribe Sericini

Maladera sp. 0F1A2322
(Sabah, Malaysia)
Sericini 0F1A9995
(Johore, Malaysia)
Sericini 086A6249
(Singapore)
Sericini 0F1A6271
(Sabah, Malaysia)
Sericini 0F1A9432
(Johore, Malaysia)

Subfamily Rutelinae

Tribe Adoretini

Adoretus sp. 086A8243
(Singapore)

Tribe Anomalini

Anomala diversipennis
(Doi Inthanon, Thailand)
Anomala pallida
(Singapore)
Anomala sp. 0F1A1185
(Doi Inthanon, Thailand)
Anomala sp. 0F1A4713
(Sabah, Malaysia)
Anomala sp. 0F1A6179
(Sabah, Malaysia)
Anomala sp. 0F1A6369
(Sabah, Malaysia)
Anomala sp. 0F1A5664
(Sabah, Malaysia)
Callistethus hamus
(Doi Inthanon, Thailand)
Mimela chrysoprasa
(Sabah, Malaysia)
Mimela discoidea
(Singapore)
Mimela insularis
(Sabah, Malaysia)
Mimela maculicollis
(Sabah, Malaysia)
Mimela uenoi
(Sabah, Malaysia)
Mimela sp. 0F1A5264
(Sabah, Malaysia)
Popillia sp. 0F1A4626
(Doi Inthanon, Chiangmai)

Tribe Rutelini

Ceroplophana modigliani
(Sabah, Malaysia)
Frushstorferia nigromulienbris
(Sabah, Malaysia)
Kibakoganea koyamai
(Doi Inthanon, Thailand)
Masumokoganea kinabaluensis
(Sabah, Malaysia)
Parastasia bigibosa
(Sabah, Malaysia)
Pelidnota sp. 0F1A0416
(Mindo, Ecuador)
Pelidnota sp. 0F1A7295
(Sumaco, Ecuador)
Pelidnota sp. 0F1A8652
(Tandayapa, Ecuador)
Rutelarcha quadrimaculata
(Sabah, Malaysia)

Subfamily Scarabaeinae

Tribe Coprini

Catharsius molossus
(Singapore)
Catharsius renaudpauliani
(Singapore)
Catharsius sp. 0F1A8289
(Sabah, Malaysia)
Copris sp. 0F1A5015
(Sabah, Malaysia)

Tribe Gymnopleurini

Paragymnopleurus maurus
(Singapore)

Tribe Onthophagini

Onthophagus cf. rutilans
(Singapore)
Onthophagus sp. 0F1A9144
(Khao Sok NP, Thailand)

Unidentified Scarabaeidae

Dynastinae (Male) 0F1A8708
(Tandayapa, Ecuador)
Dynastinae (Female) 0F1A8225
(Sarawak, Malaysia)
Scarabaeinae 0F1A6945
(Sarawak, Malaysia)
Scarabaeinae 0F1A2619
(Milpe, Ecuador)
Scarabaeinae 0F1A1090
(Mindo, Ecuador)
Scarabaeinae 0F1A4899
(Sumaco, Ecuador)
Scarabaeinae 0F1A6072
(Sumaco, Ecuador)
Scarabaeinae 0F1A7540
(Sumaco, Ecuador)
Scarabaeinae 0F1A0038
(Johore, Malaysia)
Scarabaeinae 0F1A8663
(Khao Sok NP, Thailand)
Scarabaeinae 0F1A8993
(Ranomafana, Madagascar)
Scarabaeidae 0F1A7486
(Sabah, Malaysia)
Scarabaeidae IMG_8176
(Pahang, Malaysia)
Scarabaeidae 0F1A8098
(Sarawak, Malaysia)
Scarabaeidae 0F1A2680
(Milpe, Ecuador)
Scarabaeidae 0F1A0408
(Mindo, Ecuador)
Scarabaeidae 0F1A0963
(Mindo, Ecuador)
Scarabaeidae 0F1A1042
(Singapore)
Scarabaeidae 0F1A5323
(Sumaco, Ecuador)
Scarabaeidae 0F1A5761
(Sumaco, Ecuador)
Scarabaeidae 0F1A9722
(Tandayapa, Ecuador)
Scarabaeidae 0F1A4133
(Sabah, Malaysia)
Scarabaeidae 0F1A5263
(Sabah, Malaysia)
Scarabaeidae 0F1A6258
(Sabah, Malaysia)
Scarabaeidae 0F1A5975
(Sabah, Malaysia)