Olla v-nigrum , fourth larval instar: (71) head, dorsal view; (72) mandible; (73) antenna; (74) stemmata; (75) maxillary palpus; (76) labial palpus; (77) tarsal claw; (78) mesothoracic spiracle; (79) abdominal spiracle. Scale bars: 71 = 200 µm; 72, 77 = 100 µm; 73, 76, 78, 79 = 20 µm; 74, 75 = 50µm.