True, or diving, water beetles make up the family Dytiscidae. Not listed by IUCN. Habitat: Found wherever there are stored organic materials. Conservation Status. Scientific name: Lethocerus americanus The Giant Water Bug is the biggest bug in Minnesota -- a full 2-inches long and about 1-inch wide. Aquatic hydrophilids are notable for their long maxillary palps, which are longer than their antennae. The insect can store a supply of air within its silvery belly, much like a deep-sea diver stores air in a tank. This creature is in the … This large beetle lives in water, where it scavenges vegetation and insect parts. Ponds, streams. Adult: The adults of Cyrtobagous salviniae measure 2 to 3.5 mm long and are brown during the first five days following emergence before turning shiny black for the remainder of their life. Wirligig Beetles: Crawling Water Beetles: Variegated Mud-loving Beetles: Clown Beetles: Minute Moss Beetles: Water Scavenger Beetles: Short-winged Flower Beetles: Lined Flat Bark Beetles: Fireflies: Minute Brown Scavenger Beetles: Round Fungus Beetles: Stag Beetles: Net-winged Beetles: False Darkling Beetles: Blister Beetles: Soft-winged Flower Beetles: Root-eating Beetles Water scavenger beetles make up the family Hydrophilidae. Water Scavenger Beetle (Hydrochara spp.) Order: Hemiptera Description: Adults can be over 2 inches long, flattened and oval in shape and are basically a green-brown in color. They are about one inch long, dark brown in colour with golden highlights and short, but sharp, pincers). Scientific classification: Water beetles belong to the order Coleoptera. The whirligig beetles, including Macrogyrus striolatus, are named after their habit of swimming in circles on water surfaces. Size: Very small; usually about 1/4 inch in length. Photograph by Alana Russell, LSU AgCenter. The front legs are adapted to capture and hold prey. Pupa of Cyrtobagous salviniae (Calder & Sands). The name says it all. Dytiscidae (Diving beetles) Hydrophilidae (Water scavenger beetles) Haliplidae (Crawling water beetles) Gyrinidae (Whirligig beetles) Scirtidae (Marsh beetles) Elmidae (Riffle beetles) Range: Throughout the world Whirligig beetles make up the family Gyrinidae. Scientific Name: Family Dermestidae; most are found in the wild, but a few species are well known pests. Hydrophilus triangularis. Hydrophilidae, also known colloquially as water scavenger beetles, is a family of chiefly aquatic beetles. Dytiscidae – (able to dive) are known by various common names around the world, including predaceous diving beetles, water beetles and diving beetles). Common Name: Waterbug Scientific Name: Lethocerus sp. Scientific Name. The front wings have a leathery base; the outer wings areas are more membranous with well defined veins. 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