The product is suitable for the determination of larvae and pupae of 68 simuliid species from Central and Western Europe. The identification of larvae up to species level is focused on the last larval stage, whereby in the dichotomous key a determination with or without inclusion of pupal respiratory filaments is available for selection. Data on saprobic classification and longitudinal zoning are included in the Ecology module and have been updated according to the latest version of Fauna Aquatica Austriaca. Compared to the previous edition, new species were added in V. 3.0 and some systematic changes were made.