Labial palps of Trichoptera and Lepidoptera. A–C. first, second and third labial palp segments of A. sutchanum male; D. third labial palp segment of S. marmorata male; E. Sensory field of petaloid sensilla on the third labial palp segment of S. marmorata male; F. Apical part of third labial palp segment of M. maschukella male. Abbreviations: cfs = campaniform sensilla; chs = blunt chaetoid sensilla; lts = pointed long trichoid sensilla; mps = mushroom-like pseudoplacoid sensilla; pes = petaloid sensilla; s = empty socket of long trichoid sensilla; sc = scale; sf = sensory field; tbs = thick basiconic sensilla.