<p>Electrophysiological activities of (A) cpA, (B) cpB and (C) cpC neurons in capitate peg sensillum (highlighted in a red box; picture modified from a previous study [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0149800#pone.0149800.ref035" target="_blank">35</a>]) of maxillary palp in gravid <i>An</i>. <i>coluzzii</i> females are identified by spike amplitudes, and changes in spike frequency are quantified to characterize individual neuronal response to varying concentrations of DMDS, DMTS and sulcatone. Y axis represents response spike number subtracted by control response values (DMSO) and X axis represents log transformed molar concentration of DMDS, DMTS and sulcatone. Asterisks represent significant response amplitude different from zero (***, <i>p</i> < 0.001; **, <i>p</i> < 0.01; *, <i>p</i> < 0.05; one sample <i>t</i>-test, one-sided). Error bar = s.e.m. (n = 7~10).</p