They crawl out of water and burrow into the mud to pupate. (2019, August 13). Explanation of Names . Water scavenger beetle, any of the approximately 3,200 species of the predominately aquatic insect superfamily Hydrophiloidea (order Coleoptera). It is known to play dead in order to escape predators. There are around 150- 1600 species of water bugs. Species americanus (Giant Water Bug) Other Common Names . Water scavenger beetles have smooth, oval, dark brown or black bodies and short, hairy, clubbed antennae. Unable to hold its breath, small breathing tubes called spiracles allow the bug to stay under water while drawing in air trapped under its wings, somewhat like a straw. The Giant Water Bug's body is mostly flat and oval shaped with dark brown, 'dead leaf' coloring. Commonly seen across the continental US, this beetle has the widest distribution in the genus Hydrophilus (Short and McIntosh 2014). These beetles are found swimming in marshy freshwater ponds throughout the world, especially in warm regions. But the truth is, if you’re finding a “water bug” in your basement, there’s a pretty good chance it’s actually a cockroach. ScienceDaily. It is one of the largest insects that mainly lives in clear waters, in … In about a week, the adult beetles emerge and return to water. There are different categories of water bugs that can bite. The most common ones underwater bugs include Giant water bug, Toe-biter, Electric light bug and a Brown water bug. The time it takes for the larvae to grow large enough to pupate varies by species. Lethocerus americanus (Leidy 1847) Size ♂ 47-57 mm, ♀ 58-59 mm . https://www.learnaboutnature.com/insects/beetles/water-beetle University of Kansas. The giant black water beetle (Hydrophilus triangularis) (Figure 1) is the largest aquatic-dwelling beetle in not only Florida, but in the entire United States (Epler 2010). Identification . 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