Shop › Freshwater Reviews Vol 6 Issue 1 June 2013 - Family-level keys to freshwater fly (Diptera) larvae. Image 1 of 1 Freshwater Reviews Vol 6 Issue 1 June 2013 - Family-level keys to freshwater fly (Diptera) larvae. £5.00 A brief review and a key to European families avoiding use of mouthpart characters. Add To Cart Added! A brief review and a key to European families avoiding use of mouthpart characters. You Might Also Like Guide to British Freshwater Macroinvertebrates for Biotic Assessment - SP67 Statistical Analysis of samples of Benthic Invertebrates - SP25 Measurement of Stream Water Temperature and Biological Applications to salmonid fishes, grayling and dace - OP29 Key to Freshwater Fish of Britain & Ireland Key to the Case Bearing Caddis Larvae - *NEW REPRINT* - SP61