FIGURES 13–19 in Larva of Halesus nurag Malicky 1974 (Trichoptera: Limnephilidae) and diagnostic key for the limnephilid larvae of Sardinia

FIGURES 13–19. Halesus, Stenophylax, and Leptodrusus spp., 5th instar larvae. Figures 13–16, Halesus nurag Malicky 1974, 5th instar larva: 13, sternum of abdominal segment V, ventral (black oval refers to chloride epithelium); 14, abdominal segment III, right lateral (lf = starting section of lateral fringe; fl = row of forked lamellae 1–7); 15, larval case, right lateral; 16, right mandible, right lateral. Figures 17–18, Leptodrusus budtzi (Ulmer 1913), 5th instar larva: 17, right mandible, right lateral; 18, abdominal segments VIII–X with anal proleg, right lateral (black oval refers to posterolateral setae). Figure 19, Stenophylax permistus McLachlan 1895, 5th instar larva, abdominal segments VIII–X with anal proleg, right lateral (black oval refers to single posterolateral seta). Scale bars: 1.0 mm (except Figures 14, 16: 0.5 mm).