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
                        
                     Psychomyiidae
               
            genus
                        
                     Psychomyia
            
                  “Net-tube Caddisflies”
               
      Genus Overview
                  
               
                        Psychomyia is represented by 3 North American species. Larvae live usually in cool streams on rocks and logs, where they build meandering silken tubes much longer than the larva. These tubes are covered with sand and fine detritus. They scrape and gather diatoms and other fine organic matter from the substrate around the openings of their tubes and sometimes larvae of other insects. Occasionally they harvest fungi and bacteria cultivated in the older end of the tube.
                  
               Characteristics
                  
               POLLUTION TOLERANCE
                        Southeast: 2.6
                                 Upper Midwest: 2
                                 Midwest: 1.9
                              0 = least tolerant, 10 = most tolerant
                        FEEDING HABITS
                        
                                 Collector / Gatherer
Scraper / Grazer
                        
                     Scraper / Grazer
MOVEMENT
                        
                                 Clinger
                        
                     DISTRIBUTION
                        
                                 Widespread (east of the Rocky Mtns.)
                        
                     HABITAT
                        
                                 Lotic-erosional
                        
                     Diagnostic Characters
               Order
                         
                                       
                                       
                                    Prolegs With Single Hook
                                 Family
                         
                                       
                                       
                                    Hatchet-shaped Foretrochantin
                                 
                  + Expanded Character List
                  
                     
               
            
                        Order:
                           Larvae: Wings/wing pads absent. Eye spots present, but compound eyes absent. Antennae usually small, inconspicuous. Three pairs of segmented legs present on thorax. Pair of anal prolegs, each with single hook, located on last abdominal segment. Larvae can be free-living, in silken retreats attached to substrate, or in usually-portable tubes or cases made of sand, rocks, or plant material.
                     
                     
                        Family:
                           Antennae small, nub-like, and inconspicuous. Foretrochantin broad and hatched-shaped. Meso- and metanota membranous. Abdominal tergum IX membranous. Larvae creating stationary retreats composed of sand and detritus, usually built on rocks or large woody debris.
                     
                     
                        Genus:
                           On the head, when looking ventrally, labium with pair of sclerites each longer than broad. Teeth absent along concave, ventral edge of each anal claw. Larvae constructing silken tubular cases, covered in sand, usually several millimeters in length, and found on rocks.
                     
                   
                   
                   
            Dorsal
               Lateral
               Ventral
               


