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
                        
                     Perlidae
               
            Agnetina
            
                  “Common Stoneflies”
               
      Genus Overview
                  
               
                        Located in riffles this predatory stonefly whose diet has been well studied, tend to feed off chironomids, hydropsychids, mayflies and black flies.  Identification to species as larvae is difficult and several studies have been found to erroneously report findings based on mixed species. 
                  
               Characteristics
                  
               POLLUTION TOLERANCE
                        Southeast: 0
                                 Midwest: 1.8
                                 Mid-Atlantic: 2
                              0 = least tolerant, 10 = most tolerant
                        FEEDING HABITS
                        
                                 Engulfer / Predator
                        
                     MOVEMENT
                        
                                 Clinger
                        
                     DISTRIBUTION
                        
                                 Widespread (east of the Rocky Mtns.)
                        
                     HABITAT
                        
                                 Lotic-erosional
                        
                     Diagnostic Characters
               order
                         
                                       
                                       
                                    Two Tails
                                  
                                       
                                       
                                    Two Tarsal Claws
                                 family
                         
                                       
                                       
                                    Glossae Shorter Than Paraglossae
                                  
                                       
                                       
                                    Thoracic Gills
                                 genus
                         
                                       
                                       
                                    Occipital Ridge
                                  
                                       
                                       
                                    Posterior Spinule Fringe
                                 
                  + Expanded Character List
                  
                     
               
            
                        Order:
                           Wings developing in wing pads. Mouthparts suitable for chewing. Gills digitiform and located near mouthparts, on neck, sides of thorax, or underside of base of abdomen, never on top or sides of abdomen. Two tarsal claws per leg. Only two tails (cerci).
                     
                     
                        Family:
                           Glossae much shorter than the paraglossae. Multi-branched, filamentous gills present laterally and ventrally on thorax, but not on abdomen.
                     
                     
                        Genus:
                           Cerci without a long setal fringe, Three ocelli on the head, Occipital Ridge present, regular set of spinules completely across back of head inserted on ridge,
                     
                   
                   
            Dorsal
               Ventral
               


