FIGURES 20–25 in Larva of Halesus nurag Malicky 1974 (Trichoptera: Limnephilidae) and diagnostic key for the limnephilid larvae of Sardinia

FIGURES 20–25. Halesus, Stenophylax, Leptodrusus, and Limnephilus spp., 5th instar larvae. Figure 20, Halesus nurag Malicky 1974, 5th instar larva. Femur of right hind leg, posterior face. Figures 21–23, Stenophylax permistus McLachlan 1895, 5th instar larva: 21, femur of right hind leg, posterior face (black oval refers to face setae); 22, posterior section of head capsule, right lateral (black oval refers to small spinule area); 23, abdominal segment I, right lateral (black circle refers to triplet of small posterior sclerites of lateral protuberance). Figure 24, Leptodrusus budtzi (Ulmer 1913), 5th instar larva, abdominal segments I–III, right lateral (black circle refers to missing posterior sclerites of lateral protuberance). Figure 25, Limnephilus marmoratus Curtis 1834, 5th instar larva, abdominal segments I–II, right lateral (white circle refers to trifilament gill). Scale bars: 1.0 mm.