Leucopholis pinguis
Leucopholis pinguis is a species of scarab beetle found in Sri Lanka.

Biology
Adults and grubs are known to attack many commercial plants such as Acacia decurrens, Cinnamomum camphora and Hevea brasiliensis. They mainly attack during vegetative growing stage of root and most common symptom is external feeding. Apart from that, grubs also attack nurseries of Cinnamomum zeylanicum.

References 

Melolonthinae
Insects of Sri Lanka
Insects described in 1855