L5 of Sinobirma bouyeri. A Head capsule, frontal view, scale bar = 800 µm. B Head capsule, frontal view, scale bar = 500 µm. C Frontal view, scale bar = 300 µm; a: labrum; b: mandibles. D Posterolateral view, scale bar = 500 µm; a: head capsule; b: antacoria; c1–3: the 1st–3rd antennal segments; d: mandible; e: maxilla-hypopharynx-labial complex. E Posterior view, scale bar = 200 µm; a: head capsule; b: antenna; c: mandibles; d–j: maxillae; d: cardo; e: stipites; f: palpifers; g–i: the 1st–3rd maxillary palpal segments; j: maxillary mesal lobes; k–m: labium; k: postmentum; l: mentum; m: prementum (posterior). F Lateroapical view, scale bar = 200 µm; a–c: the 1st–3rd antennal segments. G Ventroapical view, scale bar = 80 µm; a–b: the 2nd–3rd maxillary palpal segments. H Maxillary mesal lobe, ventral view, scale bar = 60 µm. I labial palpus, medioapical view, scale bar = 40 µm. J ♂, ventral view, scale bar = 1 mm; a–c: A8–10. K ♀, ventral view, scale bar = 1 mm; a–c: A8–10; d: sexual gland. L Ventral view, scale bar = 2 mm; a1–3: coxal sclerites T1–3.