Fig. 2. Typical responses obtained by tip recordings from gustatory receptor neurons in s. chaetica on the flagellum of the H. virescens antennae. Stimulation and recording starts simultaneously when the electrode is applied and ends when the electrode is removed, meaning that only the stimulation period is shown. (A) Responses to 1 mmol l^–1 quinine, 1 mmol l^–1 sinigrin, 100 mmol l^–1 sinigrin, and the electrolyte 10 mmol l^–1 KCl in the same s. chaeticum. (B) Responses to 1 mmol l^–1 quinine in four different s. chaetica. (C) Responses to 100 mmol l^–1 sinigrin in four other sensilla.