Abstract
Electrophysiological Experiments were conducted to confirm the functions of the dorsal and the anteriro organs of the onion fly larva Hylemya antique MEIGEN, which had been considered morphologically to be olfactory and gustatory. The dome of the dorsal organ responded to di-n-propyldisulfide, the onion odour and ethyl acetate, and thus proved to have an olfactory function. The anterior organ responded to 1 M solutions of various sugars and salts, and was thus confirmed to have a gustatory function.