50. Drusus monticola McLachlan, 1876, 5th instar larva, pronotum, right lateral view. 51–52. Heads and pronota of 5th instar larvae, frontal views. 51 Drusus ramae Marinkovic-Gospodnetic, 1971 (arrow: deep V-shaped pronotal notch) 52 Drusus monticola McLachlan, 1876 (arrow: shallow V-shaped pronotal notch). 53–54. Heads and pronota of 5th instar larvae, right lateral views. 53 Ecclisopteryx asterix Malicky, 1979 54 Drusus zivici Kučinić, Previšić, Stojanović & Vitecek, 2017. 55 Ecclisopteryx asterix Malicky, 1979, 5th instar larva, head and pronotum, frontal view. 56–57. Metanota of 5th instar larvae, dorsal views. 56 Ecclisopteryx asterix Malicky, 1979 (w: width, l: length of anterior metanotal sclerite) 57 Drusus zivici Kučinić, Previšić, Stojanović & Vitecek, 2017 (w: width, l: length of anterior metanotal sclerite). Scale bars: 0.5 mm.