Figure 8.

Proboscis extension is elicited by specific tastants. Probability of eliciting proboscis extension varied significantly for individual tastants (n = 95 moths/tastant). Error bars indicate SEM. Letters indicate initials of tastants eliciting significantly different response probabilities (p < 0.05, omnibus χ² test followed by individual Bonferroni-corrected χ² comparisons). Inset, Proboscis extension. Moths restrained in tubes were tested with metered drops of tastant onto the proboscis (see Materials and Methods).