Water Scavanger Beetles

Hydrophilidae

(after Hangay & Zborowski 2010): Hydrophilids are shaped like an inverted boat, with a convex dorsal surface while being flat below. They are usually dark in colour or olive-brown, sometimes reddish or black, rarely metallic, and are 1-40mm in length. Their antennae are 7-9 segmented, short, with a 3-segmented club, cupuliform, with maxillary palps usually longer than their antennae. The metatarsum are often keeled with a sharp spine at the rear, and their hind tarsi are often flattened and equipped with thick setae. Their tarsal formula is 5-5-5, rarely 4-4-4.