Hydaticus ricinus

Hydaticus ricinus, is a species of predaceous diving beetle found in India, Afghanistan, Bhutan, Myanmar, Nepal, Pakistan, Sri Lanka, China, Laos, Thailand, and Vietnam.

Description
Male is about 9.5 mm long. Suture between the metepisternum and metasternal wings is straight. Apical spurs of the hind tibiae are simple, and pointed. Scutellum is visible.