The Trichoptera Families Key enables the identification of Central European caddisfly larvae down to family level. The programme is not encrypted and can therefore be installed and operated on any number of PCs or notebooks without copy protection key (Wibu Key). The family key is designed as a demo version of the Eutaxa identification software. The download is therefore free of charge. The images contained in the programme are protected by copyright. Their use outside the product, e.g. as demonstrations at identification courses or in publications, is possible if the source (Eutaxa or www.eutaxa.com) is cited.