All / Books / Riverflies All Books Other Algae Fish Plants Invertebrates Riverflies Courses Merchandise Sale Extended Riverfly Groups Invertebrate ID Chart £10.00 Add To Cart British and Irish Stoneflies (Plecoptera) - SP73 £45.00 Add To Cart Key to the Adults & Nymphs of British Stoneflies - SP17 £8.00 Add To Cart Caddisfly Adults (Trichoptera) of Britain and Ireland - SP70 £27.95 Add To Cart Key to the Case Bearing Caddis Larvae - *NEW REPRINT* - SP61 £25.00 Add To Cart