Sternolophus inconspicuus
Sternolophus inconspicuus, is a species of water scavenger beetle found in India, Sri Lanka, Tibet, Hong Kong, Vietnam and the Philippines. Description
This large oval species has a body size of about 10.2 mm. Elytra with four distinct rows of systematic punctures. Antennae with nine segments. Prosternum highly tectiform and medially carinate. On the base of middle and hind femora, there is a hydrofuge pubescence as well as in abdominal ventrites. Metasternal keel glabrous and produced into a short spine posteriorly. Mesosternal keel has a small notch. There is an apical emargination on the posterior margin of fifth ventrite. References 

Hydrophilidae
Insects of Sri Lanka
Beetles described in 1856