The larvae of Drusus improvisus McLachlan, 1884, Drusus camerinus Moretti, 1981 and Drusus aprutiensis Moretti, 1981 are re-described and discussed in the context of contemporary keys of European Drusinae species. In addition, phylogenetic, zoogeographical and ecological notes are included.

中文翻译：

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Drusus improvisus McLachlan, 1884, Drusus camerinus Moretti, 1981 和 Drusus aprutiensis Moretti, 1981 的幼虫 (Trichoptera: Limnephilidae: Drusinae)

Drusus improvisus McLachlan, 1884, Drusus camerinus Moretti, 1981 和 Drusus aprutiensis Moretti, 1981 的幼虫在欧洲 Drusinae 物种的当代关键背景下被重新描述和讨论。此外，还包括系统发育、动物地理学和生态学注释。