The larva of , including a key to the European larvae of McLachlan, 1877 (Trichoptera, Leptoceridae).

is a leptocerid caddisfly distributed throughout the Balkan Peninsula, the Carpathians, the Hungarian Lowlands, the Pontic Province, and the Caucasus. This paper describes the previously unknown larva of this species, based on material from the Greek island of Corfu. Information on the morphology of the fifth larval instar is given, and the most important diagnostic features are illustrated. A key to the known larvae of the European species of McLachlan, 1877 is provided. In the context of existing identification keys, the larva of Ulmer, 1907 keys together with Malicky, 1972, but the species pair can be easily separated by the number of setae on the pro- and mesonotum, and setation patterns on abdominal dorsum IX.