Raw data: Anatomy of the antenna and sex patch in both sexes of three Danaus species

The anatomical characteristics of the antennae and scent patches of <i>Danaus chrysippus</i>, <i>Danaus genutia,</i> and <i>Danaus plexippus</i>, including the length of the whole antenna, the scape, pedicel, flagellum, and flagellomere, the area and the width of the apical club, the amount and size of the sensilla, the area of the scent patch and its androconial scale, and the parameters that affect the emissivity of the androconial scales.