• Integument smooth, shiny, and creamy-white, lacking all surface features
• A few setae may be noticeable at tip of terminal segment and sometimes a retractile anal proleg bearing a few crotchets is present
• Apneustic respiratory system (respiration through gills or through body surface)

Merritt, R W., K W. Cummins, and M B. Berg. An Introduction to the Aquatic Insects of North America. Dubuque, Iowa: Kendall/Hunt Company, 2008