Abstract
The mosquito Culiseta inornata has taste receptors on all the tarsal segments except the first. The labellar lobes also bear these sense organs. The sensitivity of these receptors was determined for sucrose and glucose. Attached animals were used in the experiments. The criterion of tarsal stimulation with the sugars was a downward movement of the proboscis. Spreading of the labellar lobes was used as a test for stimulation of receptors on that organ. The median acceptance threshold for sucrose resulting from tarsal stimulation was 0·135 M and the corresponding value for the labellar lobes was 0·0107 M. With glucose, the threshold was 2·095 M for the tarsi and 0·425 M when the labellar lobes were stimulated.
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