Most of the sensory structures found on
the antenna of worker bees are situated
on the 8 distal segments. The remaining 2
segments of the flagellum are exclusively
covered with sensilla placodea. Sensilla
placodea and setae occupy distinct zones
on the segments with very little overlapping.
Scape and pedicel only have hairs
and are completely devoid of setae and
sensilla (fig 3). The surface is rough in the
setae-rich zone and smooth in the sensilla
placodea-rich zone.