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 the Identification of Soil Protozoa Testate Amoebae A Guide to Estimating Microbial Numbers and Biomass in fresh water - SP39 Key to Freshwater Fish of Britain & Ireland British and Irish Stoneflies (Plecoptera) - SP73 Key to the larvae of the British Orthocladiinal - SP45 - PHOTOCOPY ONLY