The Larvae of Drusus improvisus McLachlan, 1884, Drusus camerinus and Drusus aprutiensis (Trichoptera: Limnephilidae: Drusinae).

The Larvae of Drusus improvisus McLachlan, 1884, Drusus camerinus and Drusus aprutiensis (Trichoptera: Limnephilidae: Drusinae).