order
                        
                      
                                    Coleoptera
                                       “Adult Beetles”
                                  
                                    Coleoptera
                                       “Larval Beetles”
                                  
                                    Diptera
                                       “True Flies”
                                  
                                    Ephemeroptera
                                       “Mayflies”
                                  
                                    Hemiptera
                                       “True Bugs”
                                  
                                    Lepidoptera
                                       “Aquatic Caterpillars, Snout Moths”
                                  
                                    Megaloptera
                                       “Alderflies, Dobsonflies, and Fishflies”
                                  
                                    Odonata
                                       “Dragonflies and Damselflies”
                                  
                                    Plecoptera
                                       “Stoneflies”
                                  
                                    Trichoptera
                                       “Caddisflies”
                                 family
                        
                     Syrphidae
               
            genus
                     Chrysogaster
            
                  “Hover Flies”
               
      Genus Overview
                  
               
                        Not very common in aquatic habitats. Larvae are found in damp habitats.  The adults are important pollinators. 
                  
               Characteristics
                  
               POLLUTION TOLERANCE
                        No pollution tolerance ranges defined.
                        FEEDING HABITS
                        
                                 Collector / Gatherer
                        
                     MOVEMENT
                        
                                 Burrower
                        
                     DISTRIBUTION
                        
                                 Widespread (east of the Rocky Mtns.)
                        
                     HABITAT
                        
                                 Lentic-littoral
                        
                     Diagnostic Characters
               order
                         
                                       
                                       
                                    Legs Absent
                                 family
                         
                                       
                                       
                                    Head Not Externally Sclerotized
                                  
                                       
                                       
                                    Mouth Hooks Moving Vertically
                                  
                                       
                                       
                                    Posterior Spiracles Fused
                                 genus
                         
                                       
                                       
                                    Respiratory Tube
                                 
                  + Expanded Character List
                  
                     
               
            
                        Order:
                           Wings and wing pads absent. Eye spots sometimes visible, but compound eyes absent. Segmented legs absent, but sometimes fleshy prolegs present. Sometimes with distinct head, often without head or with head drawn deeply into thorax. Body flattened, cylindrical, or maggot-like.
                     
                     
                        Family:
                           The head is not evident, but is reduced to some sclerotized rods inside the thorax; there are no segmented legs; the pair of posterior spiracles are fused with each other and usually on the apex of a telescopic respiratory tube which can be short or very long.
                     
                     
                        Genus:
                           respiratory tube about half the body when extended
                     
                   
                   
            Dorsal
               Ventral
               


