L1 of Sinobirma bouyeri. A–M Cephalic regions. A Head capsule, frontal view, scale bar = 50 µm. B Head capsule, frontal view, scale bar = 20 µm. C Head capsule, frontal view, scale bar = 50 µm. D Posterior view, scale bar = 80 µm; a: head capsule; b: labrum; c: mandibles; d–j: maxillae; d: cardines; e: stipites; f: palpifers; g–i: the 1st–3rd maxillary palpal segments; j: maxillary mesal lobes; k–q: labium; k: submentales l: postmentum; m: mentum; n: prementum (posterior); o: spinneret; p: labial palpi; q: prementum (anterior). E Lateroapical view, scale bar = 30 µm; a: antacoria; b–d: the 1st–3rd antennal segments. F Dorsal view, scale bar = 40 µm; a–c: the 1st–3rd maxillary palpal segments; d: maxillary mesal lobe. G The 2nd–3rd maxillary palpal segments, dorsoapical view, scale bar = 10 µm. H The distal area of maxillary mesal lobe, dorsal view, scale bar = 20 µm. I The distal area of labial palpus, ventral view, scale bar = 10 µm. J Seta P1, scale bar = 50 µm. K Seta MD2, scale bar = 5 µm. L Seta MD1, scale bar = 4 µm. M Part of the external surface [epicuticle] of S3, scale bar = 4 µm.