1 Wings of Habrophlebia vibrans 



2 Abdominal appendages of the male, viewed from above 



3 Abdominal appendages of the male of Ephemerella dorothea 



4 Thoracic crest of female siibimago 



5 Abdominal appendages of male of Potomanthus diaphanus 



6 Side view of end of abdomen of female, Choroterpes betteni, 



showing ovipositor 



7 Side view of end of abdomen of male 



8 Ventral view of male abdominal appendages 



442 



