30–33 Abdominal sterna I of 5th instar larvae, ventral views. 30 Drusus nigrescens Meyer-Duer, 1875 31 Drusus franzressli Malicky, 1974 32 Drusus aprutiensis Moretti, 1981 33 Drusus mixtus (Pictet, 1834). 34–35 Right hind tibiae of 5th instar larvae, anterior views. 34 Drusus melanchaetes McLachlan, 1876 (des: dorsal edge setae) 35 Drusus monticola McLachlan, 1876 (des: dorsal edge setae). 36–37 Pronota of 5th instar larvae, right lateral views. 36 Drusus vinconi Sipahiler, 1992 37 Drusus ingridae Sipahiler, 1993. Scale bars: 0.5 mm.