
Hydrophilidae, also called water scavenger beetles, is a family of chiefly aquatic beetles. Aquatic hydrophilids are notable for their long maxillary palpi, which are longer than their antennae. Several of the former subfamilies of Hydrophilidae have recently been removed and elevated to family rank; Epimetopidae, Georissidae (= Georyssinae), Helo...
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http://en.wikipedia.org/wiki/Hydrophilidae

Hydrophilidae is the water scavenger family of beetles. They are mostly round or oval bodied and have a three to five jointed club on the antennae.
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http://www.probertencyclopaedia.com/browse/BH.HTM
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