21. Like predaceous diving beetles ( Dytiscidae ), the crawling water beetles form an early offshoot of the Adephaga. 22. Most families of water beetles have larvae that are also aquatic; many have aquatic larvae and terrestrial adults. 23. "Dytiscus " species are large water beetles with a robust, rounded shape and are usually around two inches long. 24. The region around Avignon provided many excellent opportunities to collect water beetles , including large rivers and the Camargue wetlands. 25. Beetles that have water as a habitat, including long-toed water beetles , can help show the quality of fresh water. 26. Thomas also leaves Harry the keys to the " " Water Beetle " " as a place to stay. 27. Hungerford's crawling water beetle ( " Brychius hungerfordi " ) is an endangered species found only in Michigan and Ontario. 28. In the lake itself, only brine shrimp and a hardy breed of water beetle can live in the super-salty water. 29. Although most other Haliplidae are capable of flight, no observation has ever been recorded of a Hungerford's crawling water beetle flying. 30. ""'Hydroporus erythrocephalus " "'is a genus of water beetle native to the Palearctic ( including Europe ) and the Near East.